Nicki Minaj. Picture: Instagram

Nicki Minaj has surprised fans by announcing she is releasing two new songs on Thursday.

The 35-year-old rapper has been relatively quiet on social media lately, but on Monday night, the 'Anaconda' hitmaker teased her fans - known as Barbz - to share the artwork for the tracks titled 'Barbie Tingz' and 'Chun-Li'.

First she posted the visual for 'Barbie Tingz', which sees her dressed up in a Victorian gown, and wrote: "#BarbieTingz Thursday 10amPst 1pmEst everywhere. (sic)"

#BarbieTingz 🦄Thursday🦄 10amPst 1pmEst everywhere.

A post shared by Barbie® (@nickiminaj) on

And the second one saw her channel cosplay video game character Chun-Li from 'Street Fighter', rocking a risqué print thong and matching faux fur jacket.

She added to Instagram: "#ChunLi Thursday 10amPst 1pmEst everywhere. (sic)"

#ChunLi 🦄Thursday🦄 10amPst 1pmEst everywhere.

A post shared by Barbie® (@nickiminaj) on

Speaking last year, Nicki teased that her new album - the follow-up to 2014's 'The Pinkprint' - will be a "celebration" as she is happy in life. 

She said: "I know what this album is gonna mean to my fans.

"This album is everything in my life coming full circle and me being truly, genuinely happy. 

"It feels almost like a celebration ... 'The Pinkprint' was almost like my diary, closing the chapter on certain things and not knowing if I was happy or sad about beginning new chapters.

"I was really writing about feeling unsure. Now, I can tell you guys what happened for the last two years of my life. 

"I know who I am. I am getting Nicki Minaj figured out with this album and I'm loving her."

Meanwhile, Nicki previously said she'd like to make a joint album with Beyonce.

The pair previously collaborated on tracks including 2013's 'Feeling Myself' and '*** Flawless', but the 'Superbass' hitmaker would be "open" to joining forces with the 'Crazy in Love' hitmaker to produce a rival record to Jay-Z and Kanye West's 'Watch The Throne' compilation. 

Nicki - whose full name is Onika Tanya Maraj - said: "I would be open to doing [that] if the time was right. I haven't thought too much about that, though. The only person that I've seen a lot of people speak on, when talking about an album of that calibre, is Beyoncé 'cause we did '*** Flawless' [remix] and 'Feeling Myself' and we've actually performed together."