Hailey Bieber is celebrating her love with Justin Bieber! In the latest issue of, the26-year-old dished on the best part of her marriage to the pop star — who interviewed her for the spread.Inside, the «Yummy» singer asked his wife, «what's your favorite thing about being married,» which she replied, «Mmm… My favorite thing about being married is honestly the companionship I feel we have. Genuinely, you are my best friend in the entire world.