Seven Sharp host Toni Street's attempts at doing the burpee challenge for Plunket nearly ended in a wardrobe malfunction, much to the amusement of partner in crime Sam Wallace.
The 'burpees for babies' challenge gets people to video themselves performing five burpees and post it to social media, challenging five others to do the same and donate to Plunket.
The challenge is part of Plunket's efforts to raise money for community services, with the infant support service's goal to raise $10,000 through the campaign by the end of March.
Street took on the challenge in The Hits radio studio, although she had to stop halfway through after nearly losing her shirt, prompting giggles from former Breakfast weatherman Sam Wallace.
Glamour couple Richie and Gemma McCaw also took on the challenge, smashing out their burpees at the end of a workout.