When Jennifer Aniston and Reese Witherspoon’s hairstylist speaks up on a product he loves, we listen. The latest gadget to get Chris McMillan’s stamp of approval? The OO!Brush Detangling Hair Brush, a vibrating hairbrush that detangles, smooths and amplifies shine on all hair types. McMillan recently took to Instagram to share his love of the product: “scalp brushes that stimulate the scalp, that don’t hurt the scalp are very important.” Unlike your average detangling brush, the OO!brush actually does all of the work for you. It uses what the brand calls Harmonic Resonance technology to delive...