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Rahki built it on the Isley Brothers' That Lady, and Lamar turned self-love into two Grammys.

Rahki built it on the Isley Brothers' That Lady, and Lamar turned self-love into two Grammys.

Perry wrote it for herself, then refused Aguilera a retake; the demo vocal is what reached number two.

David Frank looped eight bars the night before the session; Aguilera re-sang her vocal softer and topped the Hot 100.

Started life as "The Fat Man", written by Bell for his teased son, and Philippe Wynne made it fly.

Alicia Keys sings backing behind Pino Palladino's bass, and Mayer called it the most important song he has written.

Linda Creed wrote the words while ill with cancer, and died weeks before Houston's version reached number one.

Greg Camp studied the Billboard top fifty for parts, then Shrek used it as temp music and never replaced it.

Perry left therapy sick of staying quiet, and Bonnie McKee turned that into pop's loudest dust-yourself-off chorus.
A synth flute over a Banbarra drum sample, cut at Cheiron in Stockholm, and Billboard's biggest single of 1994.

Merchant wrote it for twins she knew with a rare skin condition, and it later inspired R.J. Palacio's novel.

Forty minutes to write, eight weeks at number one, and Kadish playing the drums, guitar and bass himself.

A lyric lifted from Your Song put Elton John and Bernie Taupin on the credits of a self-made anthem.

Ne-Yo and Chuck Harmony built it on a Just the Two of Us sample; Kahn's video parades a century of divas.

Wayne named Tupac's "Keep Ya Head Up" as his model, then sang it over acoustic guitar into the top five.