According to reports Jay-Z’s headline performance at the Glastonbury festival on Saturday is said to have helped boost his record sales. Jay Z’s 2004 single 99 Problems is set to go straight into the Top 25 of the UK singles chart this weekend and also his Linkin Park duet Numb/Encore, which he closed his Glastonbury set with, is also likely to return to the Top 40. (read more…)