Adam Lambert, a judge on The X Factor Australia Season 8, threw his shoe at 15-year-old contestant, Natalie Ong, following another one of her powerhouse performances.

After slaying in the audition round, Natalie once again impressed judges in the "Three Seat Challenge" stage, which was aired on Sunday night, Oct. 16.

Performers are grouped into Unders, Overs and Group categories, with Natalie and 11 others placed in the Unders group as they are under 22 years old.

Judge Adam Lambert could only pick three out of the 12 to advance to the next stage.

The judging panel consisted of first Australian Idol winner Guy Sebastian, Australian rapper Iggy Azalea and American Idol runner-up Lambert.

Natalie was the last performer of the night and had to oust one of the three performers already chosen for the three seats.

Natalie earned high praise from the judging panel with her cover of Etta James' I'd Rather Go Blind.

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Lambert rewarded her with his shoe, explaining that it was an indication of his utmost approval and appreciation.

Lambert said: "This is hard, because I'm really happy with these three - I would have been totally satisfied just calling it a night."

"But I think you can tell I was moved by your performance, because I'm missing a boot."

This caused Sebastian to also contribute a footwear and Azalea said of Natalie's performance: "If I wasn't a diva myself wearing a pair of thigh high boots I would have thrown my shoe right at you."

Adam will take Isaiah Firebrace, 15, Amalia Foy, 14, and Natalie to the next round.

Born in Singapore but based in Melbourne now, Natalie has caught the attention of locals here with her impressive audition performance.

Related article:

15-year-old Natalie Ong from S’pore blows everyone away on The X Factor Australia Season 8

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