Janet Jackson
Janet Jackson, 49, will be returning to the spotlight this year with the release of a new album and tourREUTERS/Tobias Schwarz

After weeks of teasing her anticipated comeback, US singer Janet Jackson has finally premiered her brand new single No Sleeep and fans are lapping it up.

The 49-year-old announced the single via her Twitter account with a link to the track and a short but sweet note dedicating the song to her "love", most likely aimed at her husband, Wissam Al Mana.

The ethereal track is a collaboration by Jackson and legendary songwriting duo Jimmy Jam and Terry Lewis, who first worked with the singer in 1986.

Over the past three decades, the trio have clocked up nine number one singles on the Billboard Hot 100 chart in the US, including the songs Love Will Never Do (Without You), Miss You Much and That's The Way Love Goes.

Devoted fans of the iconic singer have heaped praise over the single on Twitter, with many describing the track as a throwback to Jackson's golden era.

No Sleeep will be released at 12am in the US and 5am in the UK on 23 June, and is expected to feature on the chart-topper's forthcoming LP, which is rumoured to be titled Unbreakable.

In May 2015, the Rhythm Nation hitmaker announced her comeback to the music industry, including an upcoming world tour.

Announcing her new plans, Jackson said at the time: "I've promised you'd hear it from my lips and now you will. This year: new music, new world tour, a new movement. I've been listening, let's keep the conversation going."

The tour, titled Unbreakable, will kick off in Canada on 31 August before moving on to North America in September.

The 36-date stint wraps up in November and it is expected to be continuing around the rest of the world in 2016, although this is yet to be confirmed.

Listen to Janet Jackson's new single, No Sleeep: