Avril Lavigne, Ryan Cabrera, EMBARGOED until 10/23/15 at 11:45 am PST

MOVI Inc.

Wardrobe malfunctions can be scary stuff, but Avril Lavigne's nip slip wasn't the reason we got the chills—it was the skeleton shirt she was wearing.

As you can see, the 31-year-old singer had on a rather spooky, sheer ensemble when she stepped out with her pumpkin-holding pal Ryan Cabrera in Beverly Hills earlier this week.

Both Avril and Ryan, 33, seem to enjoy Halloween-related festivities, but don't let this common interest (or any brief, accidental nudity) fool you: These two are just pals.

Avril Lavigne, EMBARGOED until 10/23/15 at 11:45 am PST

MOVI Inc.

Yes, Avril and husband Chad Kroeger recently separated after two years of marriage, but a source tells us she and Ryan, who romanced both Ashlee Simpson and Audrina Patridge in years past, are just friends.

Avril seems to do just fine hanging out with the boys—in fact, she's still close buds with her very recent ex! Earlier this month the Canadian crooner and the Nickelback frontman headed into the studio together. "YeeHaw! Writing with Chad today," she captioned an in-studio pic. "Back where it all started..."

Fans weren't exactly surprised to see the twosome collaborating despite their plans to divorce. When Avril and Chad first announced their separation on Sept. 2, they made it quite clear there was still love between them.

Chad Kroeger, Instagram

Instagram

"Through not only the marriage, but the music as well, we've created many unforgettable moments," Avril wrote at the time on Instagram. "We are still and forever will be, the best of friends, and will always care deeply for each other."

Good for them. Halloween is supposed to be scary, but conscious uncoupling is not.

On another note, watch the video below for an update on Avril's battle with Lyme disease.

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