Ariana Grande and Big Sean ‘dating’, Ciara and Future ‘split’ & more: Your weekly US round-up

Ariana Grande 'getting close' to rapper Big Sean

Ariana Grande and Big Sean have fuelled rumours their of a relationship, following the release of their sexy R&B ballad Best Mistake.

Singer Ariana, 21, and the 26-year-old rapper have collaborated before on her 2013 single Right There, and now sources are suggesting that their relationship is more than a professional arrangement.

Sean recently split from fiancée Naya Rivera, 27, who shocked fans by getting married just months later and Ariana has just broken things off with boyfriend Jai Brooks.

A source told E! Online: "They have been friends since they made the song together. They have been spending more time together and recently they have been getting very close. They are both doing great."

Sean and Ariana recently went to see The Purge together at a cinema in LA and people in attendance claim they were 'kissing throughout the showing'.

Tiny fuels rumours of T.I marriage problems with new video

Tameka 'Tiny' Cottle has sparked rumours of marriage problems with husband rapper T.I after the release of her new video.

The former Xscape singer, 39, recently premiered the video for new single 'What The F*** You Gon' Do' and she included a clip from their reality show The Family Hustle.

It shows T.I and Tiny lying in bed together, before his face eventually fades out.

When asked about the video recently, T.I seemed far from impressed. He told MTV News: "No reaction", before suggesting it was "Comedy".

He then confirmed that he didn't see the video before it went public, adding: "Nah, she asked me and I said, 'Nah I don't wanna, I'll wait [to see it] with the rest of the public."

Despite being married to T.I, Tiny recently felt compelled to write an open letter insisting she is 'not just his side chick'.

Directing it at those who may not realise the huge success she enjoyed with Xscape, she said: "I'm not just his wife. I'm a singer. I have been for a very long time."

Ciara and Future rocked by rumours of his cheating three months after son's birth

Ciara and Future are said to have split after allegations emerged suggesting he was having an affair with stylist Tyrina Lee.

Singer Ciara, 28, gave birth to the couple's son three months ago, and now sources are insisting that 30-year-old Future definitely cheated.

Speaking to E!, an insider said: "He cheated on her. Game over."

The couple are yet to address the cheating rumours, but Ciara has reportedly made their son and her music her only priority right now.

'Devastated' Ciara previously said of Future, who proposed to her last year: "Our label put us together. I went into the studio strictly to work, but he was very calm and sweet, a gentleman… I knew right away that he was different. Now he's my best friend in the world, my partner."

'Broody' Rihanna shares snaps of 'Aunty OhNaNa' babysitting

Rihanna has taken a break from her hectic schedule to spend some quality time with her baby cousin.

The singer, 26, is currently co-headlining with Eminem on their Monster tour but even superstars need some time out now and again.

She uploaded various pictures of the adorable baby, who was wearing a cute Tigger onesie.

Rihanna herself looked chilled in gym shorts and a Monster tour hoody.

The little girl is the daughter of Rihanna's cousin Noella Alstrom and she is no stranger to the Diamonds star's social media.

Check out the cute pictures and let us know what you think.