50 Greatest Rockers List:

1) Lifehouse-They have sold upwards of fifteen million singles and albums worldwide to date.
2) Avril Lavigne- By the age of 15, she had appeared on stage with Shania Twain; by 16, she had signed a two-album recording contract with Arista (now RCA Records) worth more than $2 million. When she was 17 years old, Lavigne broke onto the music scene with her debut album, Let Go, released in 2002.
3) Hinder-Extreme Behavior studio album 3x Platinum.
4) GreenDay- The band has generated controversy over whether the band's musical style and major-label status constitutes as "true punk"
5) Taylor Swift-On September 21, 2007, Swift helped launch a campaign to protect children from online predators.She has teamed up with Tennessee GovernorPhil Bredesen to combat internet sex crimes
6) Nelly-Nelly runs the non-profit organization "4Sho4Kids Foundation." The "Jes Us 4 Jackie" campaign began in March 2003 by Nelly and his sister Jackie Donahue after Donahue was diagnosed with leukemia. The campaign attempts to educate African-Americans and other minorities about the need for bone marrow transplants, and to register more donors. Donahue lost her battle with leukemia on March 24, 2005, almost two years after the campaign began
7) All American Rejects-Tyson Ritter started his own charity called "Don't Hate On Haiti" to raise money to get water to the people in Haiti, by designing a t-shirt. He is very passionate about Haiti, as he has stated in many interviews and on his personal Twitter account.
8) Shaggy-He is the second reggae artist and the only dancehall artist to receive a Diamond Certification for his 2001 album denoting hot shot for worldwide sales of more than 10 million copies.
9) Eminem-Eminem uses alter egos in his song to use different styles of rapping and subject matters. His most famous and popular alter ego, "Slim Shady" originated from The Slim Shady EP.
10) Keith Urban-Urban was also a judge for the 8th annual Independent Music Awards.
11) Good Charloette-The twins have also posed for the YouthAIDS Aldo "Aldo Fights AIDS" dog tag campaign.
12) Korn-WKLQ was filmed giving away hundreds of free Korn T-shirts, which were donated by the band, outside the school. Ottawa County policemen helped hand out shirts as well. Korn filed a cease and desist order against Plewes and the school district for their comments. They also threatened with a multi-million lawsuit, but both files were dropped due to the band members' personal lives.
13) Usher-In 1999, Usher participated in "Challenge for the Children", a benefit basketball game hosted by American boy band 'N Sync.
14) Tina Turner-Her legs were noted specifically as she was honored by President George W. Bush
15) Shania Twain-In January 2005, Twain joined Scentstories by Febreze to create a limited edition scent disc with the proceeds going to America's Second Harvest
16) Bon Jovi-Bon Jovi's musical style has generally been characterized as 'hard rock', 'pop or hair metal', 'arena rock' and 'pop rock', although they have also experimented and varied from these genres at times
17) Sheryl Crow-She has won nine Grammy Awards from the National Academy of Recording Arts and Sciences.
18) Meat Loaf-After more than 30 years, it still sells an estimated 200,000 copies annually, and stayed on the charts for over nine years, making it one of the best selling albums of all time
19) Tim McGraw-In the days immediately following Hurricane Katrina, McGraw and his wife, who was raised in Mississippi, joined groups taking supplies to Gulfport, Mississippi. The two also hosted several charity concerts to benefit those who were displaced by the storm
20) Madonna-Throughout her career Madonna has repeatedly reinvented herself through a series of visual and musical personas, earning her the nickname "Queen of Reinvention".In doing so, "she exploited her sexuality to fashion herself into a cultural and commercial icon who, for more than a decade, was unchallenged as the reigning Queen of Pop music."
21) Rolling Stones-Despite the Rolling Stones' predilection for blues and R&B numbers on their early live setlists, the first original compositions by the band reflected a more wide-ranging interest.
22) Nirvanna-Stephen Thomas Erlewine wrote that prior to Nirvana, "alternative music was consigned to specialty sections of record stores, and major labels considered it to be, at the very most, a tax write-off".
23) Will Smith- Hit it big in both the music business and the acting business.
24) OutKast-The duo is one of the most successful hip-hop groups of all time, having received six Grammy Awards.
25) Vanilla Ice-Van Winkle was one of the earliest white rappers to attain major success.
26) Cher-In her early career Cher was a fashion trend-setter, popularizing long straight hair, bell-bottoms and an exposed midriff. She is noted as being one of the first females to expose her bellybutton on television.
27) The Who-The Who are one of the most influential rock groups of the 1960s and '70s, influencing artists from Led Zeppelin to The Clash.
28) Fall Out Boy-While widely considered to be a pop rock and pop punk band, Fall Out Boy has also been described as emo and cites emo group The Get Up Kids as an influence.
29) Bruce Springsteen-In addition to his noted influence on music in his native New Jersey, Springsteen is also cited as an influence by Bon Jovi, Arcade Fire.
30) Kiss-Because of the ambiguity in the distinction between "hard rock"and "heavy metal",Kiss' music has always been labeled one or the other. But shortly after the band's formation, critics called them "thunderockers"
31) AC/DC- Increased popularity in rock music & sales in Cd's of that time.
32) Eagles-Eagles were one of the most successful musical acts of the 1970s.
33) CCR-CCR's music is still a staple of American and worldwide radio airplay and often figures in various media.
34) The Monkees-The Monkees also frequently contributed their own songwriting efforts on their albums and saw their musical skills improve. They ultimately became a self-directed group, playing their own instruments and writing many of their own songs.
35) Jackson 5-The singing efforts of Michael and his brothers led to the group's induction into the Rock and Roll Hall of Fame in 1997 and the Vocal Group Hall of Fame in 1999.
36) Led Zeppelin-Led Zeppelin are widely considered to be one of the most successful, innovative and influential bands in the history of rock music.
37) Alice Cooper-American rock singer, songwriter and musician whose career spans more than five decades
38) Johnny Cash-Cash influenced countless artists and left a large body of work. Upon his death, Cash was revered by the greatest popular musicians of his time. His rebellious image and often anti-authoritarian stance influenced punk rock.
39) Bee Gees-The trio was successful for most of their 40-plus years of recording music, but they had two distinct periods of exceptional success: as a harmonic "soft rock" act in the late 1960s and early 1970s, and as a foremost act of the disco music era in the late 1970s.
40) Queen-The band has released a total of eighteen number one albums, eighteen number one singles, and ten number one DVDs worldwide making them one of the world's best-selling music artists.
41) Styx-From 1977 to 1981, Styx released four consecutive albums that have been certified Multi-Platinum, for at least 2 million units sold each, by the RIAA: The Grand Illusion, Pieces of Eight, Cornerstone, and Paradise Theatre.
42) Aerosmith-Aerosmith is the best-selling American rock band of all time, having sold more than 150 million albums worldwide,including 66.5 million albums in the United States alone.
43) Eric Clapton-Clapton has been referred to as one of the most important and influential guitarists of all time.
44) Poison- Band members have released several solo albums and starred in successful reality TV shows. After 25 years, the band is still recording music and performing.
45) Pink Floyd-Pink Floyd are one of the most commercially successful and influential rock music groups of all time.
46) Guns N' Roses-The band has sold more than 100 million albums worldwide,including shipments of 45 million in the United States.
47) Joan Jett-Her musical and songwriting approach is heavily influenced by the hard-edged, hard beat-driven rhythms common to many rock bands of her native Philadelphia.
48) Kelly Clarkson-winning the inaugural season of the television series American Idol in 2002
49) Red Hot Chili Peppers-The group's musical style has fused traditional funk with elements of other genres, including punk and psychedelic rock.
50) Aretha Franklin-In 1987, Franklin became the first female artist to be inducted into the Rock and Roll Hall of Fame.She was the only featured singer at the 2009 presidential inauguration of Barack Obama.