“GLOW” star Betty Gilpin had quite the surprise for “Tonight Show” viewers Thursday.

The actress, who plays Debbie “Liberty Belle” Eagan in the Netflix comedy series, sang Britney Spears’ “Oops!…I Did It Again” in the style of Ella Fitzgerald and Louis Armstrong.

RELATED: Betty Gilpin Shares The Unconventional Way She Prepped For ‘GLOW’

Gilpin also spoke about her first Comic-Con experience and how she was overshadowed by Marvel’s super-fandom.

She explained how the panellist asking questions tried to ask if anyone had come dressed as her “GLOW” character, with one person letting out a little cough in the audience.

RELATED: ‘GLOW’ Heads To Las Vegas With Geena Davis In Season 3 Trailer

Gilpin had even been warned beforehand that the 7,000 people in the crowd were not there to see her.

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