Who knew Anne Hathaway could be such a good sport?! The terminally boring actress just came in like a wrecking ball and made us all all cheer when she took on Miley Cryus' song "Wrecking Ball" for an upcoming episode of Spike's new Tonight Show spin-off, Lip Sync Battle.

The Interstellar actress competes against Emily Blunt on the Spike show -- and chose the racy song from Miley. From the scantily-clad get-up to the over-the-top gesturing and flinging herself onto a giant wrecking ball, the Oscar winner is really kicking it up a notch in the fun department. We gotta say we are shocked and delighted by her commitment to the show -- and to letting loose!

We have no idea what Blunt will do to try and beat her -- but as far as we are concerned: it's in the bag for Hathaway!