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Fergie Sends Alanis 'Derriere' Cake for 'Humps' Video

By Jessica Herndon

04/11/2007 at 05:40 PM EDT

Fergie apparently believes that imitation is the sincerest form of flattery.

After the video for Alanis Morissette's version of the Black Eyed Peas song "My Humps" became a sensation on YouTube, Fergie sent the Canadian singer a congratulatory cake – but not just any cake, a source close to Fergie tells PEOPLE.

Fergie "thought the video was brilliant," says the source. "She sent [Morissette] a cake in the shape of a derriere."

A note on the flesh-colored cake read, "Alanis, you're a genius. Love, Fergie," according to Rosa Leung, 52, of Exotic Cakes in Los Angeles. The bakery made the specially ordered cake and delivered it to Morissette last Friday.

The source close to Fergie says that earlier reports of her sending flowers to Morissette are not true.

Reps for Morissette had no comment.

In Morissette's video for the song, she sings a moody, down-tempo version of the ode to "my lady lumps" while surrounded by men wearing sunglasses and fedoras.