Don’t forget to tune into The Ellen DeGeneres Show this Friday when the Emmy-winning chat queen tosses an informal 40th birthday party–complete with red velvet cake–for actress Jennifer Aniston.

The former Friends star stopped by Ellen’s reconstructed “Central Perk” set to promote her new chick flick He’s Just Not That Into You.

“I have to say really, I feel better than I ever felt in my life,” Jen tells El. “I did have a moment, though, over the weekend. My first like, ‘Huh … I don’t want to (turn 40)’. I found a really long gray hair and it kind of flipped me out. It’s not my first but it’s the fact that it was so long. I was like, ‘Oh, how many others are there and what does that mean?’ It actually brought me to tears slightly.”

Jennifer also revealed that she will be hosting a small party on Saturday in celebration of her birthday.