Beyonce has reportedly been putting in 11-hour rehearsal days to prepare for her Coachella headlining set on April 13-15 and April 20-22. The 36-year-old singer is "serious" about putting on a real show at the event, sources say, particularly after she had to pull out of last year's performance. The report adds that she has been working in a Los Angeles studio with "her dancers, choreographers, technicians and other members of her crew." Bey reportedly has had a team of seven security guards patrolling the studio to make sure the rehearsals are kept top secret. Beyonce's headline status was previously confirmed after she pulled out of the 2017 event and was replaced by Lady Gaga after doctors suggested she cancel her performances while heavily pregnant with twins Rumi and Sir, now six months.