Barely sing CG? She has great performances of other songs that have much wider range, try again.
Don't make me pull up that EMA performance of CG. Or any EMA performance. Or any Firework performance. IKAG performances. Don't even start. Lady Gaga is a better vocalist. She has a better sense of pitch and is far more consistent. She also uses her instrument much better. So, find a better defense, or in your words: Try again.