Olivia Culpo ''loves'' having her makeup done.

The former Miss USA enjoys getting dolled up for the red carpet and swears by keeping her skin well moisturised to achieve a ''dewy glow''.

Speaking about her beauty regime ahead of her appearance at the Billboard Music Awards on Sunday (17.05.15)she told InStyle magazine: ''Here's where the fun sets in--my makeup table. I love having my makeup done but I am equally as in love with a bare face and natural lip. I've found that the key is to give yourself a moisturized base. Hydration is important to achieving a natural dewy glow.

''There are moments that call for red lipstick, and today happens to be one of those moments. I use a quick paper lip blot to get it just right.''

The brunette beauty, 23 - who is dating Nick Jonas - also likes to kick off her day with a healthy smoothie to help her to feel good from the inside.

She said: ''I'm starting my day with a smoothie. I love to make recipes that are healthy but still taste amazing. This one is my Berry + Cherry Protein Smoothie.''

Olivia - who stunned on the red carpet in Las Vegas in a plunging, sequined black mini dress - added she loves finishing off her look with shoes and accessories and seeing her whole outfit ''come together''.

She said: ''My wardrobe for tonight includes these Giuseppe Zanotti shoes and Norman Silverman jewelry. I love seeing the full look come together.''