Showing her dedication to staying fit, Alessandra Ambrosio went for a run near her home in Los Angeles on Tuesday morning (October 22).

The Brazilian supermodel prepared for the dropping temperatures in a Cali crop top sweater and black leggings, showing off a peek of her taut tummy as she hustled past the paparazzi.

Alessandra was flying solo once again, adding fuel to the fire that her relationship with Jamie Mazur is all but dead.

During the Day By Day fashion show last week, Ambrosio distanced herself from her longtime fiancé. An eyewitness told press, “They arrived and left separately. She showed up smiling with two friends and hung out in the VIP area about 30 minutes before the show started. Jamie arrived with a pal just before it began. They sat together to watch the show, but as soon as it ended, Jamie and his friend left while Alessandra hung around to talk to her friends. She then went to the afterparty at Wax Rabbit — Jamie was nowhere in sight.”

As previously reported by the GossipCenter, a rep for Ambrosio denies that there’s any trouble in paradise.