Holly Madison spent July 4 in the sun with "Holly's World" castmates at Wet Republic in Las Vegas.

The self-proclaimed workaholic revealed that her love life has slowed as she has a really hard time meeting guys because, "I'm so busy, but someday [I'll meet someone]. I'm definitely open to it."

Hugh Hefner's ex said, "I love filming 'Holly's World' and I love doing  'Peepshow' here in Las Vegas. I'm writing a book about Las Vegas as well, so I'm keeping busy with those things and we'll see what's next."

Friends cheered as Holly stripped down to a bright red bikini showing off her American pride. The blonde bombshell divulged that her bikini secrets are simply to eat lots of fruit the day before and never forget a spray tan.

See more photos of Holly here!