The reality was Bradley Cooper — wait, no — that was Andy Samberg in a wig and a cowboy hat singing ... Mumford & Sons, Jack White, David Byrne, Robyn, Chris Martin, Cher, Dave Grohl, Ms ...

Andy Samberg, wearing a wig and cowboy hat ... Mumford & Sons, Jack White, and Cher, among many others.

“There is one song, but Justin [Timberlake’s] not here to do his parts,” Samberg offered, which Gaga met by saying: “Andy, don’t be a bitch. I’ll do it with you,” before the duo ...

(L-R) Chris Parnell, Lady Gaga, Jorma Taccone and Andy Samberg perform a Lonely Island ... Preservation Hall Jazz Band, Robyn, Jack White, Cher, Dave Grohl, Lauryn Hill, Snoop Dogg, St. Vincent ...

The reality was Bradley Cooper — wait, no — that was Andy Samberg in a wig and a cowboy hat singing ... Mumford & Sons, Jack White, David Byrne, Robyn, Chris Martin, Cher, Dave Grohl, Ms ...

she kicked things off with none other than Andy Samberg himself in a wig and cowboy hat. The former cast member attempted to sub-in for Bradley Cooper for a cover of “Shallow,” the hit track ...