While Diana wasn't sure if her brother David would be able to make it to her wedding, he returned from Afghanistan to walk her down the aisle, where the 25-year-old songstress looked stunning as she strolled towards her hubby-to-be wearing a Sareh Nouri gown, complete with a beaded belt, custom veil, and blue cowboy boots.

It was obviously an emotional moment for Diana, who told E! News that when she saw her brother, "It took every ounce of strength I had not to burst into tears. When we turned the corner and I saw Ace at the altar it was beautiful."

The groom was just as emotional, adding "I was crying before I even saw Diana walk around the corner."

Ace got a round of applause when he came down the aisle wearing a customized tux that featured the lyrics of the song he and Diana wrote, "I Do." The couple wrote their own vows, a sweet moment leaving Diana in tears several times while speaking hers. After their first, long kiss, guests threw multicolored confetti in the air!

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