The wait is finally over! BEAST is here and they're ready to flip the girl group phenomenon. We reported to you guys that they would be making their debut on Music Bank this week and they just did. It was a hot performance of their debut song, "Bad Girl." With their powerful dance moves, trained vocal skills and good looks, they're fully ready to take over the charts. It was their first time on a major televised stage together but it seems like they definitely trained seriously for their debut. Are they worthy of all the hype? Check out their hot debut. They will also perform on Inkigayo this week.