EXCLUSIVE PICS: Gwen Stefani Looks Tense Meeting With Gavin Rossdale in First Sighting Together Since Split

Gwen Stefani appears anything but enthusiastic about reuniting with her ex, Gavin Rossdale.

The 46-year-old former Voice coach and the 50-year-old Bush frontman were spotted meeting up in Beverly Hills, California, on Thursday afternoon, Stefani looking stone-faced in her black truck.

"She seemed really upset," an eyewitness tells ET. "They were always very cool and friendly but she definitely seemed different ... She seemed distant and sad."

WATCH: Gwen Stefani Is Barefaced and Beautiful in Makeup-Free Selfie

While Stefani didn't crack a smile, Rossdale appeared much more relaxed, even waving at paparazzi after their 45-minute meeting. The exes didn't speak as he drove off.

Rossdale and Stefani's divorce was finalized last month, after 13 years of marriage. ET learned that Stefani likely wasn't too happy with the terms of the settlement, specifically with regard to the section regarding the family's house. According to documents obtained by ET, Stefani and Rossdale will split the profits made from the sale of their home in Beverly Hills, although Stefani made significant upgrades to the property, including an entire new wing and a guest house. Selling the house also means she will have to uproot their three children -- Kingston, 9, Zuma, 7, and Apollo, 2 -- whom the two share joint physical and legal custody of.

But it wasn't all bad news for the No Doubt frontwoman. Although Rossdale was entitled under California law to a 50 percent stake of all the money Stefani earned and assets she accumulated while the two were married, he allowed Stefani to keep what she had acquired on her own. Rossdale has a reported net worth of $35 million, while Stefani is reportedly worth $120 million.

Still, the former couple's breakup was reportedly less than friendly. Rossdale reportedly had a three-year affair with the family's nanny, with Stefani "mortified, livid, and embarrassed" over her then-husband's alleged infidelity, and "completely devastated," Us Weekly reported last November.

"If I could, I would just tell you everything, and you would just be in shock," Stefani told The New York Times about their split in March, adding that she doesn't discuss the reasons behind the breakup partly to protect her three sons. "It's a really good, juicy story."

Stefani has now, of course, moved on with 39-year-old country star Blake Shelton, whom she's been dating since last November.

... And we already know the big smile he puts on her face.

WATCH: EXCLUSIVE: Blake Shelton Opens Up About 'Very Personal' Gwen Stefani Duet, Says It Might Be the Best Song He's Ever Written

On Monday, the couple debuted their country duet, "Go Ahead and Break My Heart," off Shelton's forthcoming album, If I'm Honest, on The Voice. Watch the video below for a look at their on-stage chemistry.

EXCLUSIVE: Blake Shelton Gushes Over 'Special' Duet with Gwen Stefani and Her Classic 'No Doubt' Songs

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