Diva makes triumphant Vegas return

Celine Dion is back to Las Vegas and sounding even better than ever!

The 'New Day Has Come' singer has return to performing at her Las Vegas residency at Caesars Palace after a year-long hiatus.

Reports say the Colosseum was sold-out for Dion's first show since last summer ... when she stepped aside to take care of her ailing husband, Rene Angelil, who's been recovering from cancer.

The 47-year-old still nailed the high notes while running through hits like 'Because You Loved Me' and 'My Heart Will Go On.'

Celine's scheduled to do 40 shows between now and January ... And would receive millions of US dollars per show.