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OTRC: Nick Jonas vacations with girlfriend in Mexico, teases 'surprise' on Twitter

Nick Jonas appears in a still from ABC's 'Mr. Sunshine.' (ABC/Michael Desmond)

Nick Jonas and his Australian girlfriend, Delta Goodrem, spent some cozy time together in Mexico over the Labor Day weekend but it's the singer's recent tweets that has send fans buzzing.

Goodrem, 26, and Jonas, 18, have reportedly been dating since May, according to Us Weekly. Goodrem broke-up with her fiancé, former Westlife singer Brian McFadden, in April after seven years of dating.

The two were spotted in Los Cabos, Mexico during the holiday weekend holding hands. On Monday, Jonas teased on his Twitter page, "I'm getting so excited about sharing my big news with all of you! Who thinks they know what it is? : )"

On Tuesday he wrote, "Headed to the airport.... Who's ready for my big announcement tomorrow?"

The singer has not dropped any hints as to what his "surprise" might be.

The couple previously vacationed together on a two-week trip to Bali in June, according to People magazine.

Nick Jonas rose to fame as part of the Jonas Brothers pop band with older brothers Joe and Kevin. The band starred in the Disney Channel TV movie "Camp Rock" and its sequel with Demi Lovato. The brothers also had a short-lived television series called "Jonas L.A." from 2009 to 2010. The band is currently on hiatus as the brothers pursue individual music careers.

In 2010 the singer formed the band Nick Jonas & The Administration. He previously dated fellow Disney star Miley Cyrus from June 2006 to December 2007.

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