Ashlee Simpson(-Wentz), who recently announced that she's pregnant, has called off her planned US tour.

"I'm really sorry to announce that I'm going to postpone my tour this summer.

Said Simpson, via her official website:

"My team gave me a few reasons I could use:

1. jury duty (but you can get out of jury duty once)
2. creative differences (but I'm a solo artist so that didn't make sense)
3. not in the mood/have a headache (wait, that was an excuse for Pete! and it didn't work. See next reason)
4. the baby

...and that's where I drew the line.

The truth is I want to put on an amazing show for you the next time I come to your town. I promise I will be back, better than ever and ready to rock out. Until then,

Love,
Ashlee"