Credit: Michael Buckner/

She's single and ready to mingle!

One day after filing for divorce from Jordan Bratman in California, Christina Aguilera touched down in Honolulu, Hawaii Friday. 

And the singer, 29, wasn't shy at her first public event since this week's shocking split announcement: Aguilera was all smiles as she flaunted her curves and cleavage in a skin-tight, hot pink dress and five-inch stilletto heels at a barbecue and concert to celebrate the opening of The Waikiki EDITION.

A source tells that Aguilera arrived at the bash with an entourage of 8. The star and her crew kept it low-key at the bash -- sipping champagne and talking quietly on chaise lounges in an oceanside VIP area. The group stayed for less than 45 minutes, departing around 8:40 p.m.

"She knows everyone knows about her pending divorce," a party observer tells Us.  "She's trying to show she's OK., confident, and going to be alright."

No sign of Max, her 2-year-old son with music producer Bratman, 33. The couple met in 2002 and wed in 2005.  Following's exclusive report that they had separated, the duo acknowledged the sad news in a Tuesday statement: "Although Jordan and I are separated, our commitment to our son Max remains as strong as ever"

The "You Lost Me" singer then filed for divorce on Thursday, stepping out with her little boy to visit a local pumpkin patch in L.A.