SYDNEY, AUSTRALIA - NOVEMBER 01: Joel Madden and Benji Madden celebrate Halloween at the 'Halloscream' party in Luna Park on
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Bands like Tegan & SaraHaim, and the recently disbanded My Chemical Romance have shown us that there's no greater bond than the one with your band... except with your family.

In celebration of National Siblings Day today, we've created a playlist of some of our favorite brother/sister acts. Check it out below!

After all, where would we be without "MMMBop"?