Serena Williams says she sang "I Will Survive" at karaoke late Sunday night and the lyrics really hit home.

Two points from losing the U.S. Open final, Williams rallied to beat top-ranked Victoria Azarenka earlier that evening. It's part of a bigger comeback from missing 10 months in 2010-11 because of a series of health problems.

Williams celebrated until 3 a.m. Monday, then set her alarm for 5:15. She took a cat nap in the green room at "CBS This Morning" while movie director James Cameron was being interviewed.

The 30-year-old Williams won 6-2, 2-6, 7-5 for her 15th Grand Slam title to wrap up a dominant summer that included championships at Wimbledon and the Olympics.