Super Junior's Heechul couldn't stop blushing over TWICE's Momo on the July 27th installment of 'Weekly Idol'.

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TWICE members featured as guests for the 5th anniversary special of the idol talk show, and the girls were tasked with making Heechul's heart beat at a fast rate. Eunha did some aegyo with little effect, but when Momo appeared, Heechul's heart started palpitating at 136 beats per second and he couldn't hold back his smile.

Not surprising considering Heechul previously mentioned Momo as one of his ideal types. Sana might have to move over!

Check out the clip below.