I know it's not a confirmation that she's ticklish or likes being tickled, but she seems to have a friend who tickles her sometimes.
She answered one of her friends (@evebe) tweets a while ago. (Chloe turned 18 this year)
@evebe: "@lulucoopss is so annoying, she's rubbing my foot" https://twitter.com/evebe/status/24041506574704640
@ChloeGMoretz: "@evebe of course coopdecoops is and her creepy tickling" https://twitter.com/ChloeGMoretz/status/24043495610122240
She answered one of her friends (@evebe) tweets a while ago. (Chloe turned 18 this year)
@evebe: "@lulucoopss is so annoying, she's rubbing my foot" https://twitter.com/evebe/status/24041506574704640
@ChloeGMoretz: "@evebe of course coopdecoops is and her creepy tickling" https://twitter.com/ChloeGMoretz/status/24043495610122240