In reply to Aj.

Actually according to Live Nation low ticket sales weren't an issue. Her venues were booked out. She postponed the concert because she had to promote Burlesque (Thanksgiving release date) plus lack of rehearsal time (Bionic came out June 8th). She never resumed the tour because after the movie NBC approached her about doing The Voice; in addition she has a kid (only one at the time) and got divorced shortly before the movie came out. So yeah. And if need be its on Billboard.com