It seems like only last week they were on our TV screens singing that "Sister Sister" theme song.  But now, Tia & Tamera Mowry are extra grown, married, mommies and have solo careers that are still pretty hot.  So these two best friends and sisters have MUCH to celebrate on their 35th birthday...

Tia Mowry Hardrict & Tamera Mowry Housley are celebrating in their own ways today.

Tia is at a spa in the Santa Fe mountains with her hubby Cory and 2-year-old son Cree while Tamera is ringing in her big day with her hubby Adam and friends:

Both of the fab sisters have big jobs ahead of them--Tia's the new star of Nick's 'Instant Mom" show and Tamera is the new co-host of the brand new daytime talk show (on Fox) "The Real".  And both sisters have teamed up to release different baby products through their joint company.

Fab things happening for both and much to celebrate this birthday year.

Happy 35th Birthday Tia & Tamera!