The 33-year-old, husband Jay Z, 45, and daughter Blue Ivy, three, were in attendance to see Tina, 61, marry Richard Lawson on a yacht in California.
Singer Beyonce posted photos from the perfect-looking day to her website, showing her daughter looking like a princess.
Blue wore white (like everybody else) and complimented her adorable dress with a sparkly crown.
Bey's sister Solange, 28, was of course present, with her husband Alan Ferguson and her 10-year-old son Daniel.
Kelly Rowland, 34, and her husband Tim Witherspoon took their baby boy Titan Jewell along for the celebrations.
While it was Tina's big day, judging by the pictures it's safe to say little Blue stole the show.
And Tina recently revealed it was her youngest grandchild who convinced her to get married again.
She told People Blue asked her and Richard when they were going to do it last September.
"Richard said, 'Oh, Blue, soon. Do you approve?'" Tina revealed. "And she said yes. That's the first time we talked seriously about getting married."