Sarah Palin and Bristol Palin Storm Mall of America

Sarah Palin joined daughter Bristol Palin at the Mall of America in Minnesota on Wednesday, whipping up a frenzy of fans and curiosity seekers -- some who waited up to 12 hours for a chance to meet the Mama Grizzly and her cub.

Bristol has launched a publicity tour for her new book, Not Afraid of Life: My Journey So Far, and mom Sarah came out to show her support and sign copies of her own books, America By Heart and Going Rogue – but only if shoppers bought Bristol's book too. Papa Bear Todd Palin was also present to meet admirers at the event.