Watch Demi Lovato Do Terrible Impressions of Iggy Azalea, Wilmer Valderrama

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We all know Demi Lovato's voice is on-point, but her impressions could use a bit of work.

While promoting her new song "Cool For the Summer," Lovato had a little fun with iHeartRadio and delivered (terrible) impressions of pal Iggy Azalea, former X Factor boss Simon Cowell, and boyfriend Wilmer Valderrama. Watch the full segment below.

WATCH: Demi Lovato Opens Up About Being a Role Model

We will say this -- Lovato improvising a sing-song version of Big Sean's "I Don't F*** With You" is pretty spectacular.

Lovato's new song "Cool For the Summer" is expected to debut next week, but that's not her only big project! Learn more about Lovato's brand new mobile game in the video below.