Personally, we never think you're too old to wear a bow. Especially, when it bedazzles your updo like Chloe Moretz's. Side Note: going with a bigger accessory draws attention away from the 'do. For a gorg piece like this, you could pair with something as simple as a pony or side bun and pass them off as updos.
Try on Chloe Moretz's looks in the Makeover Studio!