Clara of Phase Connect did her first karaoke stream to an audience of over 1K viewers. She absolutely deserved that level of attention, she is an amazing singer, does a variety of genres including english and japanese pop, rock, and even some classical stuff. If you like your anime girls to be able to sing, definitely give Clara a go.
Here's a link to listen to her karaoke, I've even timestamped it to get straight to the meat of things: