Credit: Frazer Harrison/Getty Images; Theo Wargo/NBC/Getty Images

Plenty of people know who Shawn Mendes is — enough that his first album, Handwritten, debuted at No. 1 on the Billboard 200 back in April. But don’t count Justin Bieber among them: Despite the two musicians’ similarities (both are from Canada, both are young males who’ve had great success on the charts), Bieber apparently has no idea who Mendes is.

This news came to light Tuesday when Bieber appeared on a radio show and the DJ asked if the 21-year-old has any advice for 17-year-old Mendes. “Who’s Shawn Mendes?” Bieber asked. Once it was explained to him who Mendes was, Bieber replied, “Nice. Nice. Good for him.” Either he’s being serious, or he’s just announcing the follow-up to “Where Are Ü Now” and “What Do You Mean?”

Watch the clip — where Bieber eventually says he’ll “check [Mendes] out, for sure” — below.

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