Selena Gomez has denied she is engaged to Justin Bieber.

The 19-year-old performer has been dating the pint-sized pop star for nearly a year and their romance seems to be going from strength to strength.

When images of the Wizards of Waverly Place star emerged yesterday of her wearing a ring that looked very much like the engagement variety, the rumour mill went into overdrive that the teen love birds were planning on tying the knot.

But Selena's publicist denied the reports and told Us Weekly that, "She is not engaged."

The young couple are currently enjoying a vacation in Cabo San Lucas, Mexico, where Selena is preparing to be a bridesmaid for her costume designer Shannon Larossi's wedding.

They had met while working on Selena's Disney show and the performer will also be singing at her friend's reception.

Justin and Selena were pictured lazing around in the sun yesterday at their seaside resort and the Baby singer took some snap shots of his lady love while she posed up in a sexy blue bikini.

Justin has said in the past that he wants to be a young husband and father and looks forward to those roles one day.

"If the time is right, I definitely want to be married by 25," he told Women's Wear Daily in September. "[But] I'm not looking to get married now."