Sabrina is having way too much fun with this whole thing. She got the part she wanted. She likes the songs and its a fun distraction from the ridiculousness of space. She shows up on time and leaves on time because she's not going to stick around when there are other things to do and people to see. But while she's there she is giving it 100%.
She knows her songs, she knows her dances. She maybe uses a little magic because that's what she's about.