Jay-Z's concert event celebrating the 10 year anniversary of his first album "Reasonable Doubt" took place on June 25th. You can check out pictures from the concert and the anniversary party below. Jay-Z looks really good and Beyonce looks amazing. She surprised the crowd by performing during the concert. Oh yeah, in case you're wondering how Beyonce fits in with the whole "Reasonable Doubt" theme, she sang Mary's part from "Can't Knock the Hustle". Foxy Brown also performed her part from "Ain't No Nigga" (her ear surgery was successful). Anyway, Kelly Rowland, Chris Tucker, Lebron James, Tyson, Naomi Campbell, Alicia Keys, Grandmaster Flash, Irv Gotti, and a lot of other people were also spotted out at the concert.