Nikki Webster sings 'Strawberry Kisses' atop Sydney Harbour Bridge, hasn't aged a day

Talk about a blast from the past!

Australian pop singer Nikki Webster, who memorably performed the opening and closing numbers during the Sydney Olympics in 2000, treated fans to the ultimate karaoke challenge by singing her biggest hit at the top of the Sydney Harbour Bridge.

Nikki, 29, performed 2001's 'Strawberry Kisses' alongside Sunrise weather presenter Sam Mac in a video that has since gone viral. It's amassed over 739,000 views since Sam posted it to Facebook early Tuesday morning.

Sam invited Nikki to climb the Harbour Bridge with him on Monday and take part in Bridge Climb Karaoke. (Move over, James Corden!)

"For some unknown reason, presumably divine intervention, I saw a vision of Nikki Webster flying over the bridge with me just behind her dropping a nine-second rap sequence," Sam told News.com.au.

"I am 100 per cent serious about this and it needs to claim it’s rightful spot in next year’s Hottest 100."

We'll be waiting!

If you've been wondering what she's been up to since her iconic Olympics performance, Nikki is a mum-of-one and owns a dance studio.

Ahead of the Rio Games last summer, she shared her good memories of the experience on her Instagram page.