Selena Gomez plugs Puma line during gym visit day before beau Justin...

Feeling the burn! Selena Gomez plugs Puma line during gym visit ... day before beau Justin Bieber turns 24

Selena Gomez hits the gym in Studio City, California on Wednesday.

But the 25-year-old Good For You singer did not dress herself in an ordinary workout togs.

The girlfriend of Justin Bieber made sure she wore head-to-toe Puma, a brand she is the spokesperson for.

The Big Short Actress had a black tank top that showed off her toned arms.

Earlier she was in a white, long-sleeved top that retails for around $ 40 with black-and-white leggings that sell for $ 65.

Her hair was worn down after the gym session and she looked like a natural beauty with no makeup on.

The big stand out was her high-top black sneakers.

They cost $ 120.

Gomez has been working with the brand since 2016. Other celebrity spokespeople include her ex The Weeknd as well as Rihanna.

Selena looked to be in a serious mood as he sipped on her iced coffee from Starbucks and held onto her cell phone.

Behind her was a blonde woman, but it was not known if she was a friend or a stranger.

The night before the Wolves singer was seen enjoying a Mexican meal in Studio City, California with pal Ashley Cook.

Meanwhile, the next day her boyfriend was spotted alone as he visited a community center in Los Angeles. The sensational pop was planning on his 24th birthday, which falls on Thursday.

The 25-year-old Monte Carlo actress wore a long Vous church sweatshirt paired with leggings and sneakers.

The Texas-born beauty wore her hair back in a low ponytail with some bangs falling forward.

Her pal also also had a black jacket and a black purse.

There was also a bodyguard with the girls who appeared over 6ft tall with a Puma hoodie on.

Bieber looked a little down in the dumps when he was seen on Wednesday.

The Cold Water singer wore a blue T-shirt with multi-colored sweatpants and white high-top sneakers.

The Canadian was seen in the parking lot of the community center.

The two were last seen together four days ago at his Beverly Hills rental.

It is likely the lovebirds will be together on Thursday as the Purpose crooner's 24th birthday.

It has been claimed the Vogue cover girl is going out all her beau with a big party, but Gossip has said that's not true.

Their love story goes back to 2011 when they started casually dating before calling it quits after three years.

He rekindled the flames of romance with Selena after her relationship with The Weeknd came to an abrupt finish last year.

However, things seem to be more serious this time around.

Jeremy, 42, tied the knot with his longtime girlfriend Rebelo, 29, in an outdoor ceremony in Jamaica.

Gomez has been filming Hotel Transylvania with Adam Sandler and Andy Samberg this year; the film comes out on July 13.

Later this year she will appear opposite Timothée Chalamet in the Woody Allen movie A Rainy Day In New York.

The brunette has also said she will be releasing a new album this year; its last was 2015's Revival.

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