It was a sensational sunshine day in Las Vegas yesterday, and the stars turned out in full force to enjoy the perfect desert weather. Kim and Khloe Kardashian threw a 31st birthday celebration yesterday for older sister and new mom Kourtney at Wet Republic at MGM Grand, and photographer Denise Truscello was on the red carpet welcome for the trio and then in their exclusive VIP bungalow when a towering cake was presented to the birthday girl.

Hopes of seeing the trio partying in skimpy bikinis were dashed when they decided that a stunning fashion show was more in order for their appearance. I talked with all three sisters, and they happily spilled upcoming secrets of Season.

5 of E! Entertainment’s Keeping Up With the Kardashians, which starts shooting this week. We’ll have all the details tomorrow right here at VegasDeLuxe.com, but we wanted our loyal readers to enjoy advance photos from our photo gallery that we’ll post in its entirety tomorrow.