The Grammy Awards show may be known for its one of a kind collaborations, but this group came together long before music’s biggest night to deliver a Grammy winning record: EDM heavyweights Skrillex and Diplo took home the Grammy for Best Dance/Electronic Album for 2015’s Skrillex and Diplo Present Jack Ü at the 58th Annual Grammy Awards ceremony last night. The album features Reservoir writer and Atlanta rapper 2 Chainz, who co-wrote and is featured on the album track “Febreeze”.

As always, Reservoir touched down in Los Angeles the week before the big show to celebrate. As noted in The Hollywood Reporter and Billboard, Reservoir held its annual Grammy week cocktail party on Friday evening at the Sunset Marquis in West Hollywood. Guests included a mix of the songwriters, producers, and executives behind the past year’s hits and Grammy nods, including Jamie Hartman, who co-wrote James Bay’s “Move Together” which appears on Bay’s Best Rock Album nominated Chaos and the Calm (Bay was also up for Best New Artist); newly signed Reservoir writers Julian Nixon, who co-wrote “Darkside” from Best Rap Album nominee Dr Dre’s Compton, and Mike Campbell, a force behind the 2015’s Grammy winning song “Say Something” performed by A Great Big World and Christina Aguilera; and Reservoir writers and performers WatchTheDuck, Nitin Sawhney, Nicki Wells, Bruce Roberts, and Phil Bentley with frequent collaborator Vassy. Kendra Foster, the vocalist who went on to win Best R&B Song at last night’s festivities, was also in attendance. The crowd mingled as Reservoir writer and producer Statik Selektah spun records at the DJ booth.

In attendance from the Reservoir team were Founder & President Golnar Khosrowshahi, COO Rell Lafargue, Reservoir/Reverb Music Managing Director Annette Barrett, SVP & General Counsel Jeff McGrath, EVP of Synchronization and Marketing Scott Cresto, SVP of Creative and A&R Spek, SVP of Creative and Business Development Faith Newman, Director of Marketing and Communications Catherine Addo, and Director of Licensing and Creative Andy Moerschell.

Check out pictures from the party here.