Youthful and fun, By Night is a perfume that was introduced by Christina Aguilera in 2009 for the confident female who enjoys a glamorous life. The scent is the perfect evening fragrance to wear on a date with someone special or for a romantic night at home. It features top notes of juicy mandarin and red apple, with base notes of smooth vanilla blossoms. The perfume turns heads and gets you noticed without being overpowering.