'Glee': 'Proud Mary' Keeps On Rolling For Tonight's Episode, And We Knew It First

The upcoming musical numbers in "Glee" are usually held pretty tightly under wraps, but that doesn't stop us from guessing. So it was no shocker that when the cast swung by the MTV Newsroom last week that we'd press them for details on what's in store.

Amber Riley (who plays Mercedes) was a loyal soldier and kept her lips sealed, but she was no match for MTV News' Jim Cantiello's unflappable detective skills. Check out what resulted in the video below, and then click here to see Jim get a full-on slushie facial.