You have to understand that this is Rumer's first time ever doing anything like this, including singing in front of a crowd. She's always been a singer but she's never done it in front of an audience. When it comes to Broadway, nerves does get in the way at times. Trust me, I've done stage performances where the first time you're doing it in front of an audience, it's very intimidating. Especially musical theatre and dark comedies. Brandy has been on stage for well over 20+ years so it's nothing new to her. But as for Rumer, this is her first time ever doing something of this nature outside of DWTS ever. She's a trained dancer but has never done anything of this nature. I've been doing theatre for over 20+ years myself, and every time I do a new role for the first time, it's intimidating. Plus, she hasn't been rehearsing for long either. She just started full out rehearsals two weeks ago.