There's a lot of baby bump action happening on the set of the new CBS sitcom Accidentally On Purpose: Both Jenna Elfman and Ashley Jensen are expecting!

Check out these celeb baby bumps

And mom-to-be Jensen, 40, has been grilling Elfman, 38, who already has a son, Story Elias, 2.

What happens when your underwear digs into you? she asks in the video, above.

Elfman's tip? "Get bigger underwear!"

See how these celeb dressed their baby bumps

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