"Mask" erade Contest at Simply Twilight

Speaking of contests, Simply Twilight has the same idea- rouse the troops while the pickin's are slow:

Simply Twilight has a contest running through June 7, where you can enter to win this mask and a pair of earrings. Head on over and check it out!

Note: You must be able to answer this question:

What Twilight inspired convention is taking place in Dallas, Tx from July 30^th to August 2^nd?