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Beyonce Knowles has had a pretty incredible life so far ... and today, it's hard to believe she's only turning 31.

In honor of the superstar's birthday, her official website has been taken over by her friends and family, who have posted handwritten messages of congratulations.

And some of the notes come from a few famous names!

BFF Gwyneth Paltrow (and husband Chris Martin, son Moses and daughter Apple) is probably the most recognizable star wishing "BB" a Happy B-Day.

How cute is Moses' signature?

Bey's two moms -- mother Tina and mother-in-law Gloria -- also shared their well wishes on the site.





We get it ... she's perfect!

Check out more messages from her sister Solange and Destiny's Child member Michelle Williams (plus more friends!) over at the official site.

In honor of Beyonce's birthday, check out her biggest life moments (so far!) in the gallery above.

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