Bono and the boys join forces with Hollywood A-list for Haiti
U2 were on hand to perform at the third annual Sean Penn Friends Help Haiti Home Gala in Beverly Hills.
The A-list crowd including Julia Roberts, Goldie Hawn, Gwyneth Paltrow, Paris Hilton, Emma Thompson and Chris Martin were treated to an intimate U2 gig when they turned out to support the event, which raised $6m (€4.38m) for the J/P Haitian Relief Organisation.
U2's surprise performance at the star-studded dinner party was the band's first performance together in four years.
The organisation has been working in Haiti since the earthquake of 2010, which left thousands of islanders homeless.
By the end of last year it had achieved a significant milestone in successfully relocating all of the remaining emergency camp families.
It continues to support them by providing health, education and housing services.
Sean Penn told the crowd that he hopes his organisation will be obsolete within 10 years, and added that progress in the Caribbean nation had been nothing short of "miraculous" despite corruption and "inaccurate, bad journalism".
"I'm not satisfied, I want more," he said. "But this couldn't have happened in the United States. This amount of clean-up, this amount of resilience."
Besides lending his time and his fame to the cause, Penn also gave his vintage El Camino car to benefit the organisation.
It sold for $100,000 (€73,100) at the auction on Saturday.