Pearl Jam Joined On Stage By Jay-Z [VIDEO]
Pearl Jam was joined on stage during their encore Sunday night in Philadelphia by Jay-Z for a performance of his hit "99 Problems."  It happened at the Made In America festival, which was curated by Jay-Z.
Patrick Stump Covers Jay-Z, B.o.B., Cee-Lo Green, More
Former Fall Out Boy frontman Patrick Stump has been working on his solo album for a release in February, but he took time to have some fun and post it on YouTube.  The singer recorded himself covering a capella versions of "Record of the Year" nominees at this year's Gram…