Remember whenZayn leftOne Direction *sob*? Remember Biebs' teary return to form at the VMAs?Rememebr Adele saying 'Hello' and destroyingthe charts, like, just two weeks ago?

2015 has beena tumultuous year for music and deffo one to keep us on our toes. Naturally we're lookingback at who's made waves over the past 12 months which means only one thing...yep MTV's Stars Of 2015 is BACK!

Last year 1D took the title for a second year running with a ridic 53 millionvotes. Can they make it a third? Could this be Bieber's year? Could the Mixers surprise us all and catapultLittle Mix to the top? TOO MANY QUESTIONS!

Anyway, you need to know who this year'sMTV Stars contenders are. Presenting this year's Top 50...

To vote (you know how this works), simply tweet using the hashtag #MTVStars followed by the name of the contender you want to vote for. Retweets count so remember to share the love!

Plus, as always, our trusty live leader board is back so you can track your fave's progress at mtv.co.uk/stars.

Voting starts at 1pm (GMT) today and closes at 10am (GMT) on Tuesday 15th December with the winner being announced in our results show on 19th December onMTV Music.

WHAT ARE YOU STILL DOING READING THIS? GET VOTING!