
The first female rapper to perform on a #1 hit? Surprisingly, it's Lil' Kim with the 2001 remake of "Lady Marmalade" for the movie Moulin Rouge. She was was joined on the track by Christina Aguilera, Missy Elliott, Pink and Mya.

Robert Plant's "Heaven Knows" is a satirical look at the '80s, when style seemed to trump substance.

The first version of The Beatles' "Helter Skelter" was a 27-minute jam, so you can imagine what Ringo was going through pounding away on drums. To convince the guys he needed a break, he screamed, "I've got blisters on my fingers!" This was included on the fadeout.

The game Lana Del Rey sings about in "Video Games" is World of Warcraft - her ex used to play it all the time.

"Toxic" was the most-searched song on Google in 2004 and helped Spears become the most-searched artist that year, a title she held from 1999-2001.

"Hot n Cold" by Katy Perry is about a real guy - an ex who would seem really interested at times but would then just disappear.
The man who ran Nirvana's first label gets beyond the sensationalism (drugs, Courtney) to discuss their musical and cultural triumphs in the years before Nevermind.
Harry Wayne Casey tells the stories behind KC and The Sunshine Band hits like "Get Down Tonight," "That's The Way (I Like It)," and "Give It Up."
Waters tells the "Gypsy Woman" story, shares some of her songwriting insights, and explains how Dennis Rodman ended up on one of her songs.
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."
Sheryl Crow's longtime songwriting partner/guitarist Jeff Trott reveals the stories behind many of the singer's hits, and what its like to be a producer for Leighton Meester and Max Gomez.