Name of show: Shittoko! (means "Let's get to know" in Osaka dialect.)
http://www.mbs.jp/shittoko/index2.shtml
Hosted by Othello, a highly popular female comedy duo. The name of one of them wearing the red hat is Naomi Matsushima. The other one is named Tomoko Nakajima.
The two girls on the bottom just happened to be among the guests that particular week. The woman on left is well-known actress Megumi Yokoyama. Girl on right, I can't recall her name. She isn't all that famous yet.