Hear Meghan Trainor's Justin Bieber-Approved Cover of His 'Mistletoe'

Meghan Trainor is all about that mistletoe.

The singer covered Justin Bieber's Christmas hit during an appearance at 1LIVE radio in Germany -- and Justin Bieber approved. "Nice job @Meghan_Trainor. #Mistletoe :)," Bieber tweeted. The performance follows Bieber covering Trainor's No. 1 Hot 100 hit "All About That Bass" last month. 

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Check out Trainor's performance of the holiday hit below.