With Dennis Quaid marking his 58th birthday April 9, lets take a look at him, brother Randy Quaid and other celebrity siblings.
She's a "little bit country" and he's a "little bit rock and roll," but siblings Marie and Donny Osmond have been singing together since the 1970s. Donny was also once a member of The Osmonds, a group that included him and his five brothers.
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