'It's just a ring': Nick Cannon pretends to be heartsick in funny snap as he congratulates ex Mariah Carey on her engagement to billionaire James Packer

His own marriage to Mariah Carey ended last year, but at least Nick Cannon has a sense of humour about it.

The 35-year-old America's Got Talent host enjoyed his own moment in the spotlight by posting a silly Instagram on Friday in the wake of Mariah's engagement to billionaire James Packer.

Nick was seen in a hospital bed clothed in one of those unsightly hospital gowns with eyes closed as though prostrate with heartsickness, as his pal Kevin Hart hovered over him with a worried expression.

 

 

 

So happy: Mariah flashed her new $7.5m diamond sparkler as she and James celebrated their engagement at a party in NYC on Thursday night

 

 

 Wow: The songstress' engagement ring is a stunner created by Wildred Rosado to perfectly reflect Packer's love and adoration for Mariah 

 

Three times the charm: Both Mariah and James have been three times before; they were pictured in September of last year

Nick - who shares two children with Mariah, four-year-old twins Moroccan and Monroe - seemed mighty upbeat, proof that being positive can conquer anything.

And with the Australian casino businessman worth an estimated $4.5 billion in US dollars, he's definitely someone to have as a friend.

Mariah, 45, has been on cloud nine since James, 47, swept her off her feet less than a year ago.

The songbird's engagement ring is a .35 carat diamond sparkler estimated to be worth approximately $7.5 million.

 

Well wishes: Nick (pictured with Mariah when they were still married in 2012) went on to write via Instagram that his ex-wife and her  new fiance were a 'great couple' and 'may God Bless Your Future Union'

The designer of the ring, Wildred Rosado, told Vogue he went to great lengths to create the perfect ring that would express James' total love and adoration for Mariah.

'I took the standards super high, and I wanted to create a ring that could not be measured up to,' the designer said.

'I really wanted to create something for her that was about new beginnings,' Rosado said of the Butterfly singer. 'She obviously has a strong point of view about what she likes.'

However, the smitten couple could be in for a long engagement as it's been reported neither of them are formally divorced from their former spouses.

It's thought financial-settlement issues have delayed the process for Mariah and Nick, despite arranging a pre-nup, while James and ex-wife Erica Packer's settlement has been plagued by stipulations in Australian law, according to TMZ.

MailOnline has contacted Mariah's, Nick's and James' management for clarification. 

Mariah and James went public with their romance in June of last year, and spent part of the summer cruising along the Italian Riviera on his yacht.

Talk of engagement spread like wildfire on Thursday, with representatives for the singer confirming the news to Daily Mail Australia, saying: 'Yes, the couple were engaged tonight in New York.'

The couple celebrated their new relationship status at an engagement party at Eleven Madison Park on Thursday.