The most flamboyant performer since Liberace, singer-songwriter Elton John arguably fashioned one of the greatest careers in the history of popular music. Since the songwriter first charted with the ballad "Your Song" in 1970, hardly a year passed without one of his tunes charting on Billboard's Top 40. Elvis Presley may have burned brighter faster with 10 No. 1 singles in 1956-57, but John's hit-making streak - beginning with "Rocket Man" and ending with "Sorry Seems to Be the Hardest Word" - of 16 Top 20 hits in a row (of those, only "Saturday Night's Alright for Fighting" failed to make it to the Top 10) from 1972-76 made him to the 1970s what Presley had been to the 1950s, and The Beatles to the 1960s. In 1971, John became the first act since The Beatles to have four albums on the American Top 10 simultaneously, beginning with 1972's Honky Chateau. Ultimately, he achieved the rate feat of releasing seven consecutive No. 1 albums. Some industry calculations estimated that his music once accounted for as much as three percent of annual sales worldwide. While drug and alcohol abuse dulled the hit-making apparatus throughout the hazy 1980s, the celebrated singer, composer and piano player remained a formidable live draw, appearing in elaborate stage shows wearing outrageous costumes and equally absurd eyewear. After emerging clean and sober from rehab in 1990, John widened the scope of his artistry and philanthropy to become a mainstay on Broadway and animated musical features, as well as one of the world's most outspoken advocates for AIDS research. With his knighthood, bestowed by Queen Elizabeth II in 1998, John's legacy as true entertainment royalty was secured.