There is a special pre-sale going on through Live Nation today, but tickets go on sale to the general public Friday at 10 a.m. They start at $35 and go up to $61 - that's before fees.
Also, it is important to note that select locations will be selling electronic Ticketmaster paperless tickets only. These tickets are non-transferable (so you can't get them and re-sell or give them to someone else). At entry, you will have to provide the credit card used to purchase the tickets and a valid photo ID. The entire party must enter the venue at the same time.
For non-paperless tickets, there is a delivery delay until March 1. No tickets will be printed or mailed before then.