It just wouldn't be a party without P. Diddy.

The hip hop star, who donned a red sweater honoring Biggie, was among the musicians and actors who attended Coachella on Saturday. Diddy made a special appearance during Pharrell Williams' star-studded set.

Pharrell was later joined onstage by Gwen Stefani, Snoop Dogg, Nelly and Busta Rhymes, among others. Busta and Diddy performed "Pass The Courvoisier Pt. II." Sean Combs made another cameo during Nas' set, as did Jay Z.

On another stage in Indio, Calif., Beyonce lent a helping hand to sister Solange. The crowd went wild when Queen Bey stepped onstage, joining in on the dance routine for "Losing You."

Recent Oscar winner Jared Leto attended as a guest. His band Thirty Seconds to Mars didn't perform, but the actor-rocker enjoyed the festival regardless.

Kelly Osbourne, Kellan Lutz and Carmen Electra were among the other stars who attended the event with their friends. While they dressed half-naked during the day, the stars covered up for the night concerts to face the harsh desert winds.