Justin Bieber introduces The Biebers to girlfriend, Selena Gomez

Looks like things are getting really serious between celebrity couple Justin Bieber and girlfriend, Selena Gomez.

After a romantic getaway in Hawaii and spending time with her family in Texas, Justin Bieber, 17 then flew to Canada with her 18-year girlfriend, Selena.

Selena had a chance to bond with beau’s half-siblings, Jazmyn and Jaxon. The Disney star was also introduced to Justin’s father, Jeremy.

Citing an onlooker, Us Weekly is reporting that the two spent Canada’s Memorial Day Weekend with the Biebers, describing them ‘looking like one big happy family’.

"The little kids took to Selena straight away and they were all laughing and joking around. They couldn't have been happier," the unnamed onlooker was quoted as saying by Us Weekly, according to The Hollywood Gossip .

Cover Media is saying that Selena had met not only Justin’s extended family but she had also had a chance to have lunch with other members of the Canadian sensation’s relatives, including aunts and uncles.

Justin brought Selena at his sister’s belated birthday celebration. And they were spotted having lunch at the Swiss Chalet in Toronto Wednesday.

"They were really sweet and make an adorable couple. Justin comes here whenever he's in town. For lunch he had the Grilled Chicken Caesar Salad and Selena had a cheese burger with fries,” a source was quoted telling Hollywood Life describing the couple with Justin’s family.

Justin and Selena have been rumored hooking up for months before they went public at Vanity Fair Oscar party in February.

The teen sensation first claimed Selena was her ‘best friend’ before he was seen giving her a quick kiss on the lips at Vanity Fair.

They were then seen together a number of times with Selena joining him during Justin’s break in his "My World" tour in recent months.

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Watch the VIDEO showing cut-to-cut of photos and images of celebrity couple, Justin Bieber and Selena Gomez spending time with the pop sensation’s family in Canada, giving a picture of a big happy family.