Mariah Carey and rumored new billionaire boyfriend James Packer spent the July 4 holiday weekend celebrating in Las Vegas.

TMZ reports Packer paid big bucks to have the rooftop of the exclusive Mirage Villas shut down for much of the day Saturday as the "Hero" singer, her managers, and pal Brett Ratner all enjoyed the festivities. The event marked the first public outing for the new couple since they've been back in U.S. from their Mediterranean tour aboard his mega-sized yacht.

The two also recently jetted to Israel together, sparking talk of a "pre-engagement spiritual meeting." While there, a source told TMZ, the two were slated with a "spiritual leader" that Packer has come to know and rely on.

After just a few weeks of dating, Packer and Carey are rumored to already be contemplating marriage, and the meeting is thought to be a requirement for him before he could pop the question.

During yet another recent celebration, Packer is reported to have feted Carey with another cruise where he had only her music piped and playing on the yacht for all to groove to. Reportedly, Parker had been pursuing Nick Cannon's ex for months before the two took off sailing together, and things got "immediately serious."

Carey and Cannon were married for six years before he recently filed for divorce. Several media outlets have since reported the two, who have children together, had been living apart for months before they made their split public.

Over the holiday weekend, Cannon posted a meme where he joked, "I've been single for a while and I have to say it's going very well. Like... it's working out. I think I'm the one."