During a recent appearance on 'The Kelly Clarkson Show', the girls from Wilson Phillips joined Kelly for a duet of their song 'Hold On'.
The song was released in the 90s but got a new lease on life after it was featured in the hugely popular movie 'Bridesmaids'.
Fans have been expressing their love the performance, with one even calling it 'the greatest thing ever'.
"They still got it! Those harmonies are a masterpiece." gushed another fan.
Check out the full performance in the video above.