Hudgens, who was being honored at Wednesday's event, said that "Ashley's bachelorette party will be [her] first one."
"I'm just going for the good times," Hudgens, 25, said of her friend's last fling before the ring. "It's so exciting. And, it's so crazy because I just think of us as having fun and being silly and the fact that she is getting married, my mind is kind of exploding."
As for her styling for the party, the Spring Breakers actress said she does her own makeup "all the time."
"A good cat eye and a bold lip are super simple and easy," Hudgens said. "And, I'm really into matte lipsticks right now. They actually stay and you don't have to worry about it being all over your face the entire night."
Hudgens and Tisdale have been friends since starring in the Disney channel film High School Musical in 2006. Tisdale became engaged to musician Christopher French in August 2013 after eight months of dating.
2014: The Year in Fashion [PHOTOS]
Kelly Ripa's penthouse sells for $20M