In the video for their song, Shots, LMFAO (Party Rock, Sexy and I Know It) has a little bit of a spanking. And I do mean, "a little bit"--as in, "one small smack". As in, "Blink and you'll miss it".
At the very, very end of the video, Redfoo and SkyBlu are surrounded by the others in the video. Many of them are girls in bikinis, dancing up a storm. Redfoo suddenly reaches over to his right, grabs one of the bikini-clad ladies, and pulls her over his lap and gives her bottom a small smack. It's not done in one continuous shot--like in a lot of music videos, there are a lot of jump cuts, lasting a couple of seconds at best. That's how it looks here--grabbing her is one shot, then a cut to the bottom pat in the next.
It's so quick, and so short, I wasn't even sure if I wanted to mention it here. But hey, even if it is just a brief one-whacker, I'd like to let you know about it. You can decide for yourself if you want to try and run it down for viewing.