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5. Sandra Bullock
For Bullock, she feels content in her family life and doesn't necessarily need a plus one to make her feel fulfilled. In 2013 she shared, "If [a relationship] should come along, great. But I feel like I'm not missing anything yet. Maybe one day I will. But my son is three years old, which is an amazing age. Four is an even better age. So if something happens, great, but if not, I've got plenty to do."