Pete Townshend never had a #1 UK hit with The Who or as a solo artist, but he did produce and play on a song that hit the top spot there: "Something In The Air" by Thunderclap Newman, a group he assembled.
When singing "Cradle Of Love," Billy Idol typically changes a line to, "This song is so cheesy."
Katy Perry's "Dark Horse" was co-written by Sarah Hudson, who is a singer-songwriter and a member of the Pop group Ultraviolet Sound. Though Sarah isn't related to Katy (whose real name is Katy Hudson), she is the first cousin of another famous person with the same name, the actress Kate Hudson.
Lil Wayne does an unlikely rap in a remix of the Joe Jonas song "Just In Love." The pair met at the 2008 MTV Video Music Awards.
"Heart of Glass" was Blondie's first foray into disco, which turned off some fans. Debbie Harry said they did it because they "wanted to be uncool."
"Rockin' In The Free World" is a very pro-America title, but the song takes on politicians who are indifferent to the poor and disenfranchised.
The Prince-penned "Manic Monday" was the first song The Bangles heard coming from a car radio, but "Eternal Flame" is closest to Susanna's heart, perhaps because she sang it in "various states of undress."
It took him seven years to recover from his American hit "Fool (If You Think It's Over)," but Chris Rea became one of the top singer-songwriters in his native UK.
U2, Carly Simon, Joanna Newsom, Brian Wilson and Fiona Apple have all gone to Van Dyke Parks to make their songs exceptional.
Beef with Bon Jovi? An unfortunate Spandex period? See if you can spot the true stories in this Metallica version of Fact or Fiction.
Despite appearances on Carson, Leno and a Pennebaker film, Williams remains a hidden treasure.