Celine Dion knows a thing or two about a massive single -- but the track that surprised fans in her return to Las Vegas on Saturday night wasn't one of her many hits.
Instead, the singer tried her hand at Adele's "Rolling in the Deep" at her show at the Colosseum at Caesars Palace, belting the chart-topping song after telling the crowd, "I love Adele so much. She's amazing."
A bootleg recording of the performance appeared on YouTube on Monday. After canceling several dates earlier in the year, Dion has returned with a full slate of summer performances at the Colosseum, which will run through Aug. 19.