This is a song by Beyoncé featuring Lady GaGa. It's a bit shit. This is it:

Reasons it's bad:
1). It wasn't a great song when it appeared on I Am...Sasha Fierce over a year ago and, unsurprisingly, it hasn't grown into a good song over night.
2). Lady GaGa doesn't really suit it and her vocals have obviously just been tacked onto it rather quickly (they even sound louder in the mix then the rest).
3). Videophones are a bit creepy aren't they? Not as good as telephones.

This is a song by Lady GaGa featuring Beyoncé. It's really great. This is it:

Reasons it's great:
1). It's was originally written for Britney who didn't want it and was then offered the guest spot on it but then decided she'd quite like it on her own forthcoming Greatest Hits package and GaGa said "No, I'm going to get Beyoncé on it instead".
2). It's got three choruses, Beyoncé's rap bit is brilliant and the whole thing thunders along at a rate of knots.
3). As we said above, telephones are great.