Its an internet bandwagon that you're lucky to have missed, believe me. Basically people were sending the music video for a Rick Astley song to each other. It has like 12 million views on youtube.
Back to the game haha:
http://mlb.mlb.com/news/article.jsp?ymd=20080505&content_id=2645824&vkey=news_bos&fext=.jsp&c_id=bos