Baby Spice is all grown up.

But despite actually having a child of her own, Emma Bunton admits to occasionally having the attention span of an infant.

"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," the Spice Girl wrote on her blog, in reference to a recent San Jose show she and her British pals performed.

As People magazine reports, Bunton did say she "felt a little less nervous tonight than I did in Vancouver and I really let loose and had lots of fun."

That enjoyment is helped along by Melanie Brown, who Emma writes "has a thing for pinching our bottoms ... which makes us all giggle!"

Interesting. That didn't look like Brown in the Heather Mills picture that depicted Sir Paul's ex being spanked.

All in all, Bunton concluded:"We're truly having the best time of our lives and we feel so lucky to get the chance to do it again."