The Bravo reality show personality was paired with America's Next Top Model presenter Jay Manuel for the E! telecast as a fashion consultant, the Kansas City Star reports.
During the broadcast, she told Manuel: "I'm just trying to see the real fashions, because I'm not impressed yet."
As former Will & Grace actress Debra Messing turned up for the ceremony, Leakes's co-presenter declared the star's fashion choice as "safe".
However, Leakes had her own opinion of the dress, saying: "To me, Debra's looking really plain and simple. Really, she could have just put that on and went shopping at the grocery store. I mean, really, it's just really plain and simple, though, Jay. It's not bam, hot. Debra Messing, I would expect her to be fly."
Later, she admitted that she didn't care for Gossip Girl actress Leighton Meester's low-cut Grecian-inspired gown, adding that "the shoulder pads are huge".
Manuel replied that they were "stylish knots", before Leakes countered: "Well, those knots, you can climb a mountain with those knots."