Best of 2011: The Year's Cutest Couples

This year introduced some adorable new celebrity couples as everyone from Jennifer Aniston and Justin Theroux to Selena Gomez and Justin Bieber made it official. Blake Lively dated two of Hollywood's most eligible bachelors and Sienna Miller and Tom Sturridge made a splash overseas. Between PDA-filled beach vacations and sweet photo shoots, check out some of the year's most sizzling duos in this Best of 2011 special!