(From her Facebook page)
To all my fandroids, electric ladies, supporters and jam lovers:
Starting today, I am under strict doctor's orders for mandatory vocal rest. Not doing so could possibly result in damage to my vocal cords.
Unfortunately, this diagnosis means I will have to postpone my coming concerts in Anaheim, San Diego and Phoenix, a fact which truly leaves me heartsick and shaken because I live for this: connecting with you and giving you a one of a kind concert experience.
But alas, apparently even the most expertly designed android breaks down sometimes and must recharge...
I promise to see you sooner than you think my friends, stronger than ever.
I love you all dearly.
My sincerest apologies.