These two are still going strong! The 47-year-old diva Mariah Carey is making it work with her much younger boyfriend Bryan Tanaka, 34. After calling off her engagement to Australian media magnate James Packer last October, Mariah's been joined at the hip with her backup dancer beau -- and it's no surprise, he's WAY hotter than Packer -- Packer wasn't packing much heat. That said, is is a billionaire.

The couple shared a romantic dinner at sushi restaurant Katsuya Hollywood Saturday night, both clad in matching black leather biker jackets. The two like to dress alike -- in fact the absolute best part of Mimi's World, Mariah's reality show, was her taking Bryan shopping in Paris for a new leather jacket and other big-ticket items, while he kinda acted like a diva to the store clerks and assistants ... even though he was one of them about five minutes before!

And let's deconstruct this pic ... is Bryan actually holding Mimi up as she walks down the stairs? ...