Britney Spears, 38, and Sam Asghari, 26, proved they are the workout couple of the year when they had some fun busting out a sweat together in Britney’s latest Instagram video. In the music-filled clip, the singer and her hunky beau can be seen happily taking on intense exercises at the same time such as lifting weights, doing push-ups, and even having a boxing session, and the smiles didn’t leave their faces despite the hardcore moves.