Gaga IS an ARTIST, and Bieber is just a celebrity who had a hard life before his fame, now he's an asshole with nice face and hot body, but still an asshole. Gaga also had a HARDER life than his, and she still have her feet on the ground and uses her fame to spread love, art, pop music, and an AMAZING message to her fans. What does Justin do? Draging the Argentina flag through the floor? Cool, he is an AMAZING role model.
Sorry no...when he wants to clean up his act and become a good person, we can respect him and hope for a colab, until then, GaGa doesn't have time for more fake people...