Beats Music celebrated the launch of their online streaming service with a party of a lifetime that featured several performances from big-name rappers. The packed event, which took place at Los Angeles’ Belasco Theater on Friday (Jan. 24), was headlined by Eminem and Dr. Dre.

According to Billboard, Beats Music honchos Jimmy Iovine and Trent Reznor curated a special '90s playlist, which DJ Jazzy Jeff posted on his Instagram page, of veteran rap acts from the decade.

Performers included a reunited Diddy & Ma$e (who performed 'All About the Benjamins'), Ice Cube ('It Was a Good Day'), Busta Rhymes ('Put Your Hands Where My Eyes Could See'), Bone Thugs-N-Harmony ('Thuggish Ruggish Bone'), Nas ('If I Ruled the World'), Cypress Hill ('Insane in the Brain') and many others.

Eminem and Dr. Dre closed out the show with a medley of their hits including, 'My Name Is,' 'Lose Yourself' and 'Forgot About Dre.'

Among the guests spotted in the crowd watching the spectacle were Macklemore, Drake, Selena Gomez and Pink.

Check out some of the videos from the event below.