How very merry! Selena Gomez slips into a racy red festive romper as she belts out Christmas tunes at a concert

She just recently enjoyed a relaxing and romantic Mexican getaway with her boyfriend Justin Bieber.

And it seems as though the time off has really rejuvenated Selena Gomez.

Slipping into a racy red Christmas romper, the 19-year-old belted out tunes at the Now 99.7 Triple Ho Concert 2.0 at HP Pavilion in San Jose, California, last night.

How very merry! Selena Gomez slipped into a racy red festive romper to belt out Christmas tunes at a concert in San Jose, California, last night

The Wizards Of Waverly place star showed off her super slim figure in the spangled attire, which featured tiny shorts and a low-cut front.

The singer let the risque outfit do all the talking, wearing her brunette locks out in a natural wave and accessorising with

a simple pair of hoop earrings.

As always Selena used her rhinestone-encrusted microphone for the energetic performance.  

Meanwhile, the teenager found an unusual way to celebrate Christmas  -  with a crazy socks party.

Slim: The Wizards Of Waverly place star showed off her super slim figure in the spangled attire, which featured tiny shorts and a low-cut front

The get together, which was attended by a few of Selena's friends, occurred over the weekend.

Selena posted a few pictures of herself and her buddies via Twitter.

'We're the 6 best friends that anyone could have' and 'Bout to have a crazy socks party.... Pics soon :)' she wrote as she posed with her pals, shopping in a superstore. 

Christmas fun: Meanwhile, the teenager found an unusual way to celebrate Christmas - with a crazy socks party with some friends over the weekend

She then posted an image of herself and a female friend donning some cheery Christmas socks, with the Disney star writing: 'Yes... It happened.'

The goofy outing was certainly a different scene to her holiday in Los Cabos with Justin. 

The couple were there for the wedding of one of Selena's close friends and also to celebrate their one year anniversary.

Holiday: Selena just recently returned from a relaxing and romantic Mexican getaway with her boyfriend Justin Bieber

During their down time the teenagers were spotted looking completely loved up as they lounged poolside as well as beachside in the sunny Mexican setting.

At one point the amorous pair were seen sharing a lingering kiss on the golden sands, before cooling off in the ocean and making a splash on a pair of jet skis.

Putting the drama of recent weeks behind them - which has seen Justin accused of fathering a lovechild - the happy couple frolicked.

Kisses: The popstar couple, who recently denied their own engagement, were in Mexico to attend a friend’s wedding with Selena as the bridesmaid

Over the course of a few days, they were also spotted lazily sunbathing on sun loungers as a snap happy Justin took photos of his girlfriend.

The popstar couple, who recently denied their own engagement, were in Mexico to attend a friend’s wedding with Selena as the bridesmaid.

The former Wizards of Waverly Place star was dressed in a halter neck sapphire blue dress which complemented her olive skin tone.

Stunning: The former Wizards of Waverly Place star was dressed in a halter neck sapphire blue dress which complemented her olive skin tone

She was seen walking down the aisle with the other bridesmaids holding a simple bouquet of just a few white flowers.

Justin was also at the intimate ceremony and was looking casual for the occasion with a cream blazer with the sleeves rolled up, a white T-shirt and a pair of green baggy shorts.

Selena was supporting her close friend, Shannon Larossi, who looked stunning in her white bridal gown as she made her way down the aisle.

The friends met on the set of her hit show Wizards of Waverly Place, where Larossi was a costume designer.

Home time: Justin and Selena arrived back on U.S soil last Friday

Justin and Selena arrived back on U.S soil last Friday.

They clutched hands as they arrived in Washington D.C., although Selena looked particularly shy and held her hand over her face the entire time.

The pair were in the nation's capital to perform at the Christmas In Washington concert on Sunday.