MANILA -- Alex Gonzaga took social media by storm on Monday night after a video of her touching Pia Wurtzbach’s left breast made the rounds online.

Apparently, it happened last December when Wurtzbach appeared on "ASAP Chillout," where Gonzaga is one of the hosts.

While Wurtzbach was talking about her experience in filming “The Revenger Squad,” a curious Gonzaga suddenly touched Wurtzbach’s boob.

“Grabe,” Wurtzbach told Gonzaga while laughing. “Hindi mo na talaga natiis momsh, ano? Talagang hindi na niya natiis eh.”

See 00:29 mark.

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Wurtzbach then went on to answer another question from Gonzaga’s co-hosts, but she later on admitted that she can’t move on from Gonzaga’s hilarious gesture.

Gonzaga reposted a part of the clip on Twitter where she tried to explain what happened. “When starstruck ka sa lahat ng parte ng katawan ni Queen Pia. Have a good day everyone!” she wrote.

When starstruck ka sa lahat ng parte ng katawan ni Queen Pia😏 have a good day everyone! https://t.co/ggmdsIp7Br

— Alex Gonzaga (@Mscathygonzaga) January 29, 2018

“The Revenger Squad” was Wurtzbach’s first movie since winning Miss Universe in 2015.

Currently, she is working on another big screen project titled “My Perfect You” with Gerald Anderson.