OTTAWA— Two people were arrested Wednesday afternoon and a third terrorism suspect– one who moonwalked across a Montreal stage during an audition for Canadian Idol – was detained early Thursday, the Star has learned.

Khuram Sher was arrested as part of an RCMP national security investigation, as police continue to investigate a possible cell allegedly plotting to attack targets at home.

Sher told judges on the popular reality show in 2008 that he hailed from P***stan and was a fan of “hockey, music and acting.”

He sings an off-tune rendition of Avril Lavigne’s “Complicated” with – as the show’s website describes – some “nifty” dance moves.

“Have you ever thought of being a comedian?” asks one of the judges of the 26-year-old.

Another remarks: “The dance moves were good, the singing, bad.”

One source close to the investigation said Sher was actually a Canadian-born physician and graduate of McGill University – quite a different persona from goofy contestant wearing a traditional P***stani shalwar kameez and pakul hat as he performs robot dance moves and a Michael Jackson moonwalk.

Two other alleged members of the group police believe were trying to form a local terrorism cell appeared in an Ottawa court Thursday.

Read Full Story Here