"I'm so nervous," said Grande. "I don't speak; this is my first time speaking in front of people. I've never talked on a talk show. I feel vulnerable, I feel so weird."

However, Fallon was able to calm the pop star down with his easy going manner, even managing to convince Grande to perform her impression of Celine Dion.

Grande's second album, "My Everything", continues to dominate the charts with four singles issued to date; the record currently sits at No. 20 in the US Billboard 200 album chart.