WTF KINDA COSTUME IS THIS?

Is this Adam Levine's idea a sexy costume? Maybe he wants us to think that he got into a bitch fight with Elton John and his shirt was ripped off in the scuffle but Adam managed to get away with Elton's favorite pair of sunglasses. Yeah, that must be it!

And is that Britney's dog London or Britney's wig in his hand?