Pentatonix, the quintet a cappella group that won Season 3 of NBC’s "The Sing-Off," just released their new cover for Ariana Grande’s "Problem!"  

Grande proves she is a fan as well!  She tweeted the band saying how excited she is for the song. 

The vocal sensations have coverd all of your favorite pop hit from Lady Gaga’s "Telephone" to Macklemore's "Thrift Shop."

Their next EP, PTX VOL. III will drop September 23rd and their holiday mashup album That’s Christmas to Me will be available October 21st.

Listen to their new cover for, "Problem" below!