The duo looked to be very affectionate at Clive Davis' Pre-GRAMMY Gala last month, and now they seem to be working together in the studio.WATCH: Exes Avril Lavigne and Chad Kroeger Walk Red Carpet Arm-in-Arm at Pre-GRAMMY Party Lavigne was all smiles in this captionless photo, shared on Tuesday night, cuddled up next to her estranged husband on a white couch, each holding an instrument."It is with heavy heartse that Chad and I announce our separation today," Lavigne wrote, alongside a smiling snapshot with her estranged husband.

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We would like to officially put on record that all previous, slanderous remarks about Ryan are false and did not come from a credible source.” A source told E! Adding that “Avril was extremely affectionate to Ryan, giving him cute hugs in the booth and kisses.” The source said “they seemed in love.” Lavigne and Cabrera have reportedly been friends for 12 years, and both have denied rumors of a romantic relationship.

According to TMZ, it seemed things were heating up between the couple in August at STK Midtown in New York.

The musicians walked the red carpet together at the event, and Lavigne later called the party a "lovely night." in 2013 and is working on her sixth studio album.

The singer revealed she was diagnosed with Lyme disease in April after alluding to "health issues" in late 2014.

You try to keep it private as much as you can.” It is with heavy heart that Chad and I announce our separation today.

A post shared by Avril Lavigne (@avrillavigne) on Lavigne took to Instagram in September 2015 to announce her separation from Nickelback frontman, Chad Kroeger.A post shared by Avril Lavigne (@avrillavigne) on But this isn't the first time these exes have hit the studio together since their split.Lavigne shared a pic of Kroeger strumming a guitar back in October 2015 with the caption, "Back where it all started..." PICS: Avril Lavigne Had the Ultimate Girls Weekend -- Complete With a Britney Spears Cameo While neither party has put their wedding rings back on, they did strike quite the couple-y pose on the red carpet last month.Lavigne and Kroeger first began dating in 2012 while working together on her fifth album.After just one month together, Kroeger put a ring on it and the pair wed in the South of France on July 1, 2013. PHOTOS: Celeb splits of 2015 The "Complicated" singer took to Instagram to share the sad news with fans.