It's that time of the year again!

If you haven't prepped yet, you better start sorting out your shortlists on your fave tracks of 2019 - voting for triple j's Hottest 100 countdown kicks off next week!

On Saturday 25 January, we'll be counting down the Hottest 100 songs of the year, as voted by you. Then on the public holiday, Monday 27 January, we'll back it up with the songs that just missed out, the Hottest 200.

Listen along on your radio, online, and the triple j app, which we'll be doing some cool things with during the countdown.

Here's the key dates for your diary

Monday 16 Dec 2019: Voting opens, 8am AEDT

Voting opens, 8am AEDT Mon 20 Jan, 2020: Voting closes, 3pm AEDT

Voting closes, 3pm AEDT Sat 25 Jan, 2020: Hottest 100, from 12pm AEDT

Hottest 100, from 12pm AEDT Sun 26 Jan 2020: All-Australian music for Australia Day

All-Australian music for Australia Day Mon 27 Jan 2020: Hottest 200-101 on triple j and Hottest 100 of 1999 on Double J, from 10am AEST

The Hottest 100 has a new charity partner!

Concerns about climate change replaced mental health, housing, and jobs as the number one most important issue facing you, the triple j audience. So, after teaming with Lifeline and AIME, we're now getting behind Greening Australia to do something about restoring the environment!

Greening Australia have tree-planting projects across the country to restore natural environments, cool our cities, save endangered animals and pull carbon out of the atmosphere.

If you agree that the only thing that should be getting hotter is the songs in our countdown, chip in a donation. We'll even send you a Hottest 100 temporary tattoo for every $30 you donate.

Read more about the positive environmental impact you Hottest 100 donations can have below.