Robert Pattinson [1] has officially joined the ranks of celebrities getting in on the ALS ice bucket challenge [2] fun, and it is everything you could have hoped for. Straying away from the expected, Rob treats us to what only can be described as a superhot wet t-shirt moment. (You can see his stomach!) Interestingly enough, the video popped up on pal Zac Efron [3]'s YouTube channel on Wednesday, just one day after Zac nominated him. Watch the video for the first time below!