The once-troubled singer, 36, looked relaxed and healthy on her casual day with model Asghari, 24.
The two wore tee shirts and walked close together, showing affectionate body language.
As RadarOnline.com has previously reported, Spears is on a break from Las Vegas and recently completed a UK tour.
Sources said Spears is enjoying her well-earned break and even decided to ditch her punishing gym routine to relax this fall.
But she'll soon ramp up her exercising to prepare for her new Las Vegas residency, beginning in February 2019.
The residency at the Park Theater inside Monte Carlo resort in Vegas will soon start -- after her five-year stint at Planet Hollywood ended on New Year's Eve, 2017 into 2018.
Asghari has been a supportive and loving boyfriend through all her concerts, sources have said.
Scroll through Radar's gallery for more on Spears and her main man.
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"Crazy" for each other. Spears and Asghari have been together since the end of 2016 after meeting on the set of her "Slumber Party" music video.
Asghari has been right by Spears' side for about two years now. They're known for going on cozy date night dinners, attending friends' birthday parties and celebrating special occasions together.
Despite an age difference, the blonde beauty, who has gone through years of scandals and bizarre incidents, doesn't mind flaunting her romance. Spears has documented her fun times with Ashgari on social media.
In October, a source told Radar, "This is the first time in years that Britney's not worked out at least once a day. She figures it's the least she deserves while she's in between gigs."
Spears recently wrapped up her "Piece of Me" European tour, in which she enacted some pretty hardcore regulations to keep fit on the road, including no alcohol. Wedding rumors flew about her and Asghari after she was spotted wearing a gold band on her marriage finger.
The star and her beau dressed casually on their outing and she lovingly touched his arm. Spears married Kevin Federline in 2004 and they split in 2006 after having two sons. K Fed has battled Spears over child support money.
An insider has told Radar that Asghari has become a stabilizing force in Spears' life after her well-publicized meltdowns. In 2007, she shocked the world by shaving her head.
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