At what 2007 event did Ricky Gervais perform as David Brent with Mackenzie Crook?

Ricky Gervais performed as David Brent with Mackenzie Crook at the Concert for Diana in 2007. The event took place at Wembley Stadium on 1 July 2007 to honour Diana, Princess of Wales, around the tenth anniversary of her death.

Gervais appeared alongside Crook, who reprised Gareth Keenan, and they performed “Free Love Freeway,” the song associated with Brent in The Office. The performance briefly recreated the awkward musical partnership between Brent and Gareth for a huge live audience.

The appearance became especially memorable because a technical delay forced Gervais to fill more time than planned before Elton John's closing performance. He extended the routine with Brent's familiar dance and additional comedy, creating one of the event's most widely discussed moments.

This is easy to confuse with Live 8, where Gervais also performed elements of The Office in 2005, but Crook did not join him there in the same Brent-and-Gareth performance. The Concert for Diana was attended by approximately 63,000 people and broadcast internationally.