Ryan's shirt says “Do You Wuphf?”
URL Reads: http://wuphf.com/
Wikipedia: Lip Dub:
Jakob Lodwick, the founder of Vimeo, coined the term "lip dubbing" on December 14, 2006, in a video entitled Lip Dubbing: Endless Dream. In the video's description, he wrote, "I walked around with a song playing in my headphones, and recorded myself singing. When I got home I opened it in iMovie and added an MP3 of the actual song, and synchronized it with my video. Is there a name for this? If not, I suggest 'lip dubbing'.