Megan & Liz are no strangers to covers. The Internet sensations have paid tribute to pretty much every big name in music, from Justin Bieber to Ed Sheeran, via their official YouTube channel, which has more than 198 million views. So, after we here at MTV announced our Best Songs of 2012 we figured, what better way to honor these tunes than by having the twins mash-up an acoustic rendition of our list?

The duo put together a medley of all 10 songs that made MTV's list: Maroon 5's "Payphone," the Wanted's "Glad You Came," Psy's "Gangnam Style," Kanye West's (featuring Big Sean, Pusha T and 2 Chainz) "Mercy," Taylor Swift's "We Are Never Ever Getting Back Together," Nicki Minaj's "Starships," One Direction's "What Makes You Beautiful," Gotye's (featuring Kimbra) "Somebody That I Used To Know," Fun.'s "We Are Young," and Carly Rae Jepsen's "Call Me Maybe." And in true Megan & Liz style, they sang the songs with no musical accompaniment other than their trusty guitar.

When asked their favorite songs from 2012 , one sister went with a pick from our list. "Taylor Swift 'We Are Never Ever Getting Back Together.' That song is like, so great, so well written," Megan Mace said, Liz Mace couldn't get enough of Justin Bieber's "Beauty and a Beat." "It's my jam," she said.

This isn't the first time Megan & Liz have helped us with a mash-up either. Earlier this year the twosome honored VMA nominees Rihanna, Katy Perry, Beyonce, Nicki Minaj, and Selena Gomez, who were all up for a Moonman for Best Female Video.

Who do you think had the best song of the year? Let us know in the comments below!