 More recently the iTunes Store has begun selling music videos for use on Apple's iPod with video playback capability.The 2008 video for Weezer's "Pork and Beans" also captured this trend, by including at least 20 YouTube celebrities; the single became the most successful of Weezer's career, in chart performance.In 2007, the RIAA issued cease-and-desist letters to YouTube users to prevent single users from sharing videos, which are the property of the music labels.