Cirque du Soleil is celebrating its 20th year doing shows in Vegas. The official Cirque Week is November 9th-16th with Treasure Island acting as host casino. You can purchase ticket packages of 2, 3, 5, 7 or 8 shows and best of all you don't have to see "Believe"

3 show packages (for example) available from $150 plus taxes/fees

There are also apparently tickets available for events duing the week

http:/www.cirquedusoleil.com/en/promo/cirque-week/tickets.package.aspx