Article continues below advertisementJenna Bush Hager almost had a nip slip on live television.During the Tuesday, August 12, episode of TODAY With Jenna & Friends, the talk show host, 43, bared her cleavage while attempting to flip a tire during an on-air workout.Article continues below advertisementJenna Bush Hager's Fitness MishapSource: TODAY With Jenna & Friends/YouTubeJenna Bush Hager tried a workout from Taylor Swift's gym.Bush Hager sampled exercises from Sergio King, a trainer at Taylor Swift's gym, DOGPOUND.