It just felt like she was trying a little too hard. Maybe the National Anthem is just best done simply... She ended up apologizing:
"I've always been honored and proud to perform the national anthem, and last night I wanted to try something special for the NBA, I'm a risk-taker artistically, but clearly this rendition didn't strike the intended tone. I love this country and honestly tried my best."
*Sheds one sad small tear *Forgives Her
Here is another time she sang the national anthem for reference.