is "very happy" with her new boyfriend Brody Jenner.
The 'Girlfriend' singer - who started dating
'The Hills' star in February after filing for divorce from her husband, Sum 41
rocker Deryck Whibley, last October - and her new lover are very settled in their relationship, according to Brody's close friend Audrina Patridge.
Audrina - who starred with him in 'The Hills' - said: "They're very happy together, they're really good together. A lovely couple."
Audrina also revealed the pop star has fitted in well within their friendship group - because she is such a "nice girl".
She exclusively told BANG Showbiz: "I first met her a couple of years ago, and thought she was such a nice girl then. She's still a really nice girl now, and is really very talented. She's so great."
Avril and Brody have grown closer and closer in recent months, and recently proved their dedication to one another by having matching tattoos.
Avril has a 'Brody' inking next to her right breast, while Brody's 'Avril' tattoo is on his inner arm.
It is also believed they are planning to show the world their romance in a reality TV show based solely around their union.
The final episode of 'The Hills' will air on MTV UK on Sunday August 15 at 9pm. 'The Hills Season 5' box set is out now.