Happy Birthday, Jen!

We'd be remiss if we failed to extend our well wishes and a hearty "Happy Birthday" to Jennifer Aniston. The "He's Just Not That Into You" star turns 40 today. Yup, 40 years young and hotter than ever. We can't write you a song like your paramour John Mayer, but we can offer you our undying love. That ought to count for something.

For a look back at photos of Jen throughout the years, check out this little salute over at PopSugar.