Dr. Dre and Timbaland surprised students at Culver High School in Los Angeles on Wednesday night (June 23) when the two made an impromptu appearance at the school's graduation party.

Timbaland took the stage to perform his singles 'Say Something,' 'Promiscuous Girl' 'Carry Out' and 'The Way I Are,' while Jimmy Iovine, chairman of Interscope, Geffen and A&M Records, looked on. The promotional event was sponsored by Interscope Records and Hewlett-Packard, who have recently joined forces in an effort to improve digital sound quality. According to the Associated Press, HP donated $10,000 worth of computer equipment to the high school and the performance was recorded for an upcoming Internet documentary. Students were treated to free food, photos and participated in a raffle to take home prizes from HP.

When probed about a possible collaboration between Dre and Timbaland, Iovine didn't sound too hopeful. "We should be so lucky," Iovine said. "I can only get them so close. The rest is up to them."

Dr. Dre's long-awaited 'Detox' album is currently slated for a 2011 release. An unfinished version of his song 'Under Pressure' featuring Jay-Z recently leaked on the Web.