Kérastase Densifique Bodifying Mousse Work a pump of the Kérastase Densifique Bodifying Mousse ($37) before you blow-dry to instantly thicken up your hair. The mousse will help you on your Ariana Grande-level ponytail journey. Image Source: sephora.com Kérastase Densifique Bodifying Mousse $37 from sephora.com Buy Now