Watch Marina Diamond (of Marina & The Diamonds) sing "Have Yourself A Merry Little Christmas."

Though she's never had a lick of formal training, Marina Diamond (aka Marina & The Diamonds) has the vocal game on LOCK -- just in the last year alone, Marina has made pit stops in Russia, Europe and the U.S. with Coldplay, and she nearly stole the show as an opener for Katy Perry's "California Girls" tour. Anyway, you could imagine how pumped we were to include her in our "12 Holidaze" series, where we ask our favorite musicians (like Austin Mahone, The Wanted, and MGK) to sing a holiday song of their choice. Singing Judy Garland's 1944 classic "Have Yourself a Merry Little Christmas," Marina's gentle, old Hollywood delivery definitely gives us a Christmas-themed case of the warm and fuzzies.

Watch Marina and The Diamonds sing "Have Yourself A Merry Little Christmas" after the jump.

When asked what she'd like for Christmas, Marina offers, "I'd like to be a bit more carefree and worry less, and say yes to more things than I would have in the past." But more to the point, she'd just like to "carve out some time to live normally." Makes total sense when you're stuck on the road and promoting a fantastic record (Electra Heart). "Two weeks ago, I was having panic attacks and crying three days in a row," she confessed. "And this week, I'm fantastic! I haven't really stayed in one place for more than three weeks, so it's definitely time for more stability." Yeah, we kinda think the Welsh-Greek pop diva has earned a well-deserved holiday.

Thankfully, Marina will get a taste of the good life when she heads to Wales this Christmas to spend some quality time with her mom and big sis. On the agenda: a traditional dinner, "lots of mints," and plenty of Bailey's and ice, she said. And perhaps if they're lucky, she'll trot out the "Christmas" tune, too.

+ Watch Marina and The Diamonds sing "Have Yourself A Merry Little Christmas."

Watch more Marina and The Diamonds videos at MarinaAndTheDiamonds.MTV.com!

Photo credit: MTV