Since I'm vain, makeup on vacation is a semi-essential. If I happen to leave the pool, here's what I throw on for dinner, drinks, and public appearances at the hotel lobby (jk).
Perfume: Since NO ONE wants to smell like chlorine, a few dabbles of Tocca (travel size) is an essential.
Brow Wand: This gel is the best way to tame your caterpillars and add a little color (without making you look tacky). I have literally gone through bottles of this stuff.
Foundation: Lets get real, I'm not Beyonce, so foundation is a must.
Mascara: It's a crime to leave any house/hotel without mascara. This stuff offers a nice curl and is similar to wearing falsies.
Blush: I love this MAC blush because it completes a minimal beauty look and makes a vacation glow, "glowier."