There was plenty of smack-talk and plenty of theatrics, but in the end, there could be only one winner in the Lip Sync Battle between Agents of S.H.I.E.L.D. star Clark Gregg and Agent Carter star Hayley Atwell: the viewers.

Oh, all right, there was actual winner declared on this week's episode of the Spike TV show, but that was secondary to seeing Gregg perform Britney Spears' "Toxic" in futuristic flight attendant uniform, and Atwell channel Lady Gaga for a crowd-pleasing rendition of "Bad Romance." You can watch both performances below.

When all was said and done, it was Gregg who received the champion's belt. We doff our tiny blue hat to you, sir.