Newly single Pink was so determined to save her failing marriage that she booked a romantic getaway for husband Carey Hart and herself just before announcing they had broken up.The singer went public with the latest celebrity marriage split last week, even though she had just booked a getaway in Oahu, Hawaii. An insider tells In Touch Weekly magazine, "She recently booked a seven-day vacation at The Kahala Hotel and Resort in Honolulu for the week of February 28."She asked for their most romantic beachfront suite."But Pink, 28, canceled the $3,000-a-night retreat with Carey.Meanwhile, a dancer on the singer's summer 2007 tour tells the publication Pink has been far from happy about her marriage for some time.And another friend adds, "They started talking divorce within a few months of their wedding and then they surprised everyone by deciding to work it out instead. But their split surprised no one."Pink, real name Alecia Moore, and Carey were married in January, 2006, in Costa Rica.