Baby Spice: I'm So Worked Up, I Forget the Lyrics
"I'm getting more confident singing live," Bunton, 31, writes on the Spice Blog, "but during 'Mama' I got so carried away looking at the video playing behind us of all the mothers and babies that I forgot some of the lyrics!"
Bunton was writing from an airplane after performing in San Jose, Calif., on Tuesday night. "I felt a little less nervous tonight than I did in Vancouver and I really let loose and had lots of fun," she writes.
It sounds like Melanie "Scary Spice" Brown is enjoying herself, too. She "has a thing for pinching our bottoms ... which makes us all giggle!" Bunton reports.
All in all, "We're truly having the best time of our lives and we feel so lucky to get the chance to do it again," Bunton writes.
The Spice Girls play their next show Friday in Los Angeles.