Article continues below advertisementMonster JamSource: @heidimontag/InstagramHeidi Montag stays in shape while juggling her career and family life.Posing next to a monster truck, Heidi Montag flaunted her figure in a white top, red pants and black and white sneakers. She layered with a leather jacket and cinched her waist with a black belt."If I were a monster truck driver... This was the most incredible event! Thank you @monsterjam !!!! This is Monster Jam!" she captioned the Instagram update.