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Your sister is the perfect partner in crime. She knows your moods and idiosyncrasies better than anyone –– and the feeling is mutual. So whether on a road trip, weekend getaway, or international flight, admit it: There's no one you'd rather have around to endlessly annoy (and to annoy you). And who better to travel with than the one who never gets tired of belting out the same old tunes in the car with you?

For these reasons and more, here's why you should make traveling with your sister a priority.