The singer will present the main show this Sunday from Belfast's Odyssey Arena, and confirmed during a press conference today she will also perform.
"I will be performing," Gomez told reporters. "It's fun, there's sparkles.
"I have all my dancers out here [in Belfast], it's probably the biggest performance I've done."
Gomez describes being given the hosting role as "a dream come true," revealing, "I am going to be doing things I have never done before. Initially I was a little nervous knowing how many international stars and viewers would be watching.
Luckily one of the television shows I used to work on did a lot of improvisation, so I should hopefully be ready for whatever is thrown my way."
Among the artists nominated for awards at this year's EMAs are Adele, Lady GaGa and Katy Perry.
The evening will also see performances from the likes of Justin Bieber, David Guetta, Coldplay, Jessie J and Lady GaGa.
The MTV Europe Music Awards 2011 will air on Sunday November 6 on MTV.
Watch Selena Gomez's MTV EMAs 2011 teaser video:
Watch the music video for Selena Gomez's 'Love You Like a Love Song' below: