Selena Gomez looked happy and healthy as she enjoyed some fun in the sun with her pals over the weekend.

The former Disney starlet was pictured aboard a luxury yacht in Sydney Harbour with a huge group of her close friends, reports the Mirror.

The 25-year-old, dressed in a bright orange bikini top and black tie up bikini bottoms, was all smiles as she read a book and lapped up the sunshine.

Other shots show her messing around with hunky pal Johnny Rays as she playfully tries to pull him into the sea with her.

Despite her recent break from on-off boyfriend Justin Bieber, Selena appeared to be in great spirits.

Shortly after the singer was pictured at Justin's dad's wedding in Jamaica at the end of February, the couple are said to have split again.

 A source told Page Six TV: ’They’re supposedly taking a break. She has trust issues. He has trust issues. There’s a lot going on there. They do this all the time. They get into arguments.

‘They’re not talking. It’s hard to keep up with those two!’

While another source told People magazine that the pair's most recent split had nothing to do with Selena's mum Mandy Teefy, who had made no secret of the fact she wasn't happy about them rekindling their romance.

‘They’re not on a break because of her relationship with her mum. They have their own issues and are always on and off,’ a source told the publication.

The source went on: ‘They’ve been having disagreements, but it wouldn’t be surprising if they’re back together in a week.’

As for Selena, 25, and her mum's relationship, the insider added: ‘They didn’t talk for a while. They’re not hanging out together, but they’ve been communicating.’