Justin Bieber got upstaged in the cute department -- by his own brother!

The teen singing sensation arrived at the 2012 Much Music Awards last night in Canada ... and while girlfriend Selena Gomez was in the house, she wasn't his red carpet date.

Instead, 18-year-old Bieber walked the arrivals line with his adorable, two-year-old half-brother Jaxon and "Call Me Maybe" singer Carly Rae Jepsen.

"GREAT NIGHT here in CANADA!! Glad to be home. Got to rock the carpet with my lil bro JAXO! He killed it," Bieber posted on Twitter after the awards -- where he picked up two trophies including one for UR Fave Artist.

Check out more photos from the show above!

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