After a tough year, Sum 41 singer Deryck Whibley had cause for celebration over the weekend.

The rocker wed his girlfriend Ariana Cooper at a romantic outdoor ceremony in the Hotel Bel Air in Beverly Hills on Sunday, walking down the aisle to Happy Together by The Turtles.

Friends described the ceremony, which was attended by just 100 guests, as "chilled and intimate."

Deryck, whose first wife was singer Avril Lavigne, ended up in hospital last year with kidney and liver failure following years of alcohol abuse.

Doctors placed him in a medically induced coma in April 2014 after he collapsed in his living room and left family fearing for his life. Luckily Deryck survived the incident and is now leading a teetotal life, with the knowledge that just one drink could end up killing him.

"I was drinking hard every day. Until one night. I was sitting at home, poured myself another drink around midnight and was about to watch a movie when all of a sudden I didn't feel so good," the musician wrote in a post on his website at the time.

"The reason I got so sick is from all the hard boozing I've been doing over the years. It finally caught up to me."

Rather than traditional champagne, the newlyweds toasted to their new life together with non-alcoholic cider. And in another sweet twist on the traditional, bride Ariana wore white Converse under her stunning strapless corseted gown with silver embellishments.

 

A photo posted by The Real Dave Baksh (@dave_brownsound) on Aug 31, 2015 at 6:37am PDT

Although Avril and Deryck remain on relatively good terms, the Complicated singer was not in attendance for her ex's big day, having accepted an altogether more exciting invitation from Taylor Swift in San Diego the night before:

So incredible sharing the stage with @AvrilLavigne! 'Complicated' is such a brilliant pop song and I just love her. pic.twitter.com/JnE5ShK8ok

— Taylor Swift (@taylorswift13) August 30, 2015

Yup, we'd choose that over a wedding too.