The Rock Star with Side Swept Bangs can be found on the first floor of the Clothing Store and purchased for 10 Bucks. Purchasing this hat will allow you to wear this hat only in Adopt Me!, unless you buy this item from the Roblox Catalog.
The description of this item on the Roblox Catalog reads
"Rule #1 of being a Rock Star - never let anyone see both your eyes at the same time. Keep it mysterious by letting your hair always fall over at least one eye."