Perhaps the reason Leonardo DiCaprio isn't married is that he hasn't found a lady he loves as much as his mom. The "Great Gatsby" star said, "To have a woman like [my mother] in your life, who is strong, who'll be honest with you about who you are ... that's something I treasure. And it's something I look for in a woman." Leo constantly brings mom Irmelin to events, premieres, and even on vacation. When the star went to Cancun in 2012, Irmelin came along and even stayed with her son, while then girlfriend Erin Heatherton stayed several miles away. Sorry, Erin, but it's family first in the DiCaprio house!