I'm not crazy about using the word "crush" this way, but which celebrities stand out to you people these days?  These are my picks, in no particular order:
Kirsten Dunst
 
America Ferrera (Betty Suarez from "Ugly Betty")
 
Selena Gomez (Alex Russo from "Wizards of Waverly Place")
 
Alyson Hannigan (Lily Aldrin from "How I Met Your Mother")
 
Jennifer Love Hewitt (Melinda Gordon from "Ghost Whisperer")
 
Melina Kanakaredes (Stella Bonasera from "CSI: NY")
 
Eva LaRue (Natalia Boa Vista from "CSI: Miami")
 
Emily Osment (Lily Truscott from "Hannah Montana")
 
Emily Procter (Calleigh Duquesne from "CSI: Miami")
 
Brenda Song (London Tipton from "Suite Life on Deck")
 
Ashley Tisdale
 
Liz Vassey (Wendy Simms from "CSI: Crime Scene Investigation")
 
Selena Gomez and Emily Osment only turn 18 this year.  So I thought it wouldn't hurt to throw them in the mix now.