Originally a chart-topper for Steve Lawrence in 1962, "Go Away Little Girl" became the first song of the rock era to hit #1 for two different artists when Donny Osmond's cover version also reached the summit in 1971.
Katy Perry's song "E.T." came from a beat originally intended for the rap group Three Six Mafia. When her producer accidentally pulled up the beat, Perry asked to use it.
The Isley Brothers' "That Lady" was sampled by Kendrick Lamar for his 2014 single "I." Lamar turned up at Ronald Isley's house to personally ask permission to borrow from the song.
The Bryan Adams song "(Everything I Do) I Do It For You" was almost rejected for the movie Robin Hood: Prince Of Thieves because it didn't sound medieval enough.
Michael McDonald's "I Keep Forgettin'" is based on a '60s song with the same title written by Jerry Leiber and Mike Stoller.
Scott Stapp of Creed wrote "With Arms Wide Open" when he found out he was going to be a dad. He named his son Jagger.
Ian talks about his 3 or 4 blatant attempts to write a pop song, and also the ones he most connected with, including "Locomotive Breath."
Eddie (played by Johnny Depp in the video) found fame fleeting, but Chuck Berry's made-up musician fared better.
Rufus Wainwright on "Hallelujah," his album Unfollow The Rules, and getting into his "lyric trance" on 12-hour walks.
The stories behind the biggest hit songs about trucking.
Our chat with Barney Hoskyns, who covers the wild years of Woodstock - the town, not the festival - in his book Small Town Talk.
Songs that seem to glorify violence against women are often misinterpreted - but not always.