This is the best video we've seen in a long time ... and that's really saying something.

For some reason this random clip from 2008 just started making the rounds today, showing Robert Pattinson and Katy Perry attempting to sing Boyz II Men's "I'll Make Love To You" at Dimple's karaoke bar in Burbank.  

The two were reportedly celebrating Shannon Woodward's birthday ... and we're pretty sure neither of them hits a single correct note.

Basically, this video is awesome. Our only complaint: We wish it was longer!

FYI: Katy celebrates her own birthday today. She turns 29.

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