Listen to Psy on iHeartRadio | Listen to Justin Bieber on iHeartRadio | Listen to Taylor Swift on iHeartRadio

Canada's music video showcase, the MuchMusic Awards, enjoyed a healthy dose of Psy on Sunday night.  The South Korean rapper, who served as the ceremony's co-host, opened the show with "Gangnam Style" and closed it with "Gentlemen."  The MuchMusic Awards, which aired on FUSE in the U.S., also included performances from stars like Demi Lovato, Phillip Phillips, Ed Sheeran and Avril Lavigne.  Lovato and Lavigne both were winners as well, picking up Best International Video and Best International Video by a Canadian for their latest singles.  

Pop star Justin Bieber didn't make it back to his native Canada for the awards, but did win the Favorite Artist/Group category, beating out Carly Rae Jepsen and Drake.  Taylor Swift, who was in Toronto this weekend on her "Red" tour, did make an appearance, and was on hand to accept the Favorite International Artist or Group award. 

Other stars who attended Sunday's MuchMusic Awards were "Glee" star Naya Rivera and her boyfriend Big Sean, Austin Mahone and Cody Simpson. 

2013 MuchMusic Awards Winners List: 

Video of the Year 
Classified feat. David Myles, "Inner Ninja" 

Post-Production of the Year 
Billy Talent, "Surprise Surprise" 

Dance Video of the Year: 
deadmau5 feat. Chris James, "The Veldt" 

Director of the Year: 
Drake, "Started From the Bottom" 

Pop Video of the Year: 
Marianas Trench, "Desperate Measures" 

Rock/Alternative Video of the Year: 
Serena Ryder, "Stompa" 

Hip-Hop Video of the Year: 
Drake, "Started From the Bottom" 

MuchFACT Video of the Year: 
Classified feat. David Myles, "Inner Ninja: 

International Video of the Year ? Artist: 
Demi Lovato, "Heart Attack" 

International Video of the Year ? Group: 
Macklemore & Ryan Lewis feat. Wanz, "Thrift Shop" 

International Video of the Year by a Canadian: 
Avril Lavigne, "Here?s to Never Growing Up" 

Your Fave Artist/Group: 
Justin Bieber 

Your Fave Video: 
Marianas Trench, "Stutter" 

Your Fave International Artist or Group: 
Taylor Swift 

Viral Video of the Year: 
Psy, "Gangnam Style" 

Photo Credit Getty Images