All three acts will be making their EMA debuts at the 2012 awards in Frankfurt, Germany, next month.
'Call Me Maybe' singer Carly said: ''I am beyond thrilled - feeling like a lucky duck for the nominations and the chance to perform. Now the only concern is what to wear?! Let the party begin.''
Rita, fun., and Carly are all nominated in the awards' Best PUSH and Best New categories.
Carly Rae's 'Call Me Maybe' and fun.'s 'We Are Young' are also both nominated in the Best Song section.
fun. said: ''It's so incredible that we'll be playing at the MTV EMAs, when not that long ago not many people knew who we were in Europe. It just feels like that dream most people don't get to experience.''
Already confirmed to play at the EMAs are Taylor Swift, Muse and No Doubt. Leading nominations is Rihanna with six nods, closely followed by Taylor with five. Justin Bieber and Katy Perry are next with four nominations each.
Lady Gaga, Lana Del Rey, Nicki Minaj, Jay Z and Kanye West each have three EMA nods, while other nominees include Green Day, Gotye, Pitbull, Flo Rida, Arctic Monkeys, Jack White and One Direction.