Here's my recap: (and for those of you complaining about Jordin going last, she went first last week)
Melinda Doolittle
“Love You Inside”- Good vocals, but her version was just like LaToya London's version- BORING. Did not make me jump out of my chair. Randy, Paula and Simon felt like it didn't wow them in anyway and told her she can do better. “How Can You Mend a Broken Heart” - Finally Melinda picks a song that I've actually heard of before (other than Heaven Knows). After what, eight weeks. The first half of the song was alright, but the second part was great. Randy felt it was better, Paula sitll wants to be wowed and Simon told her it booked her a ticket to the semifinals.
Blake Lewis
“You Should Be Dancing” - Beat-box style- Sang basically the whole thing in either beat box or falsetto. Not very good. Really pitchy and the beat boxing did not work out. Randy felt it didn't work out for him. Paula liked the beat boxing but not the singing and Simon thought it was horrible. Personally I thought it was excruciating. I liked Blake best when he sang "Somewhere Only We Know" in Week 1 and wish he would sing more songs like that.
“This is Where I Came In” - There was a reason this song was not a hit for the BG's. He added more beat boxing in this one too. Randy did not like it and told him he does not always have to beat box. Paula loved him. Simon said he was vulnerable. Unfortunately, the three divas will probably split votes leaving Blake safe.
Lakisha Jones
“Stayin’ Alive” - LaKisha slowed this down a bit and did not go up as high. She got back to her shouting in parts, but overall I thought she did a good job of making it her own and didn't think it was that bad. However, the judges hated it. Simon did not want to kiss her anymore. I don't get how some can change up songs and some can't. Definitely not as bad as the judges made it out.
“Run to Me” - Wasn't great, but wasn't bad. Some parts of it were pretty good. Randy said it was better than the first song and Paula loved it. Simon basically ensured that she would leave by telling her she had a bad night and that she was as vulnerable as Blake. The two best Bon Jovi performers were the two worst tonight.
Jordin Sparks
“To Love Somebody” - Best performance of the night. When asked to compare it with Clay Aiken's verison- you can't. They are different. She made it a Mariah Careyish performance and did a nice job with it. Clay's was also great. Barry said that it was probably the best version he had heard of it. The three judges loved it.
“Woman in Love”- Jordin could have wrapped this competition up with a solid performance in her second song. Unfortunately, she made an awful song choice and Simon called it pagaenty. It seemed like she was whining the whole song. Randy didn't like it that much and Paula loves it anyway. Even though I thought this was a horrible theme for the Top 4, Jordin could have picked a better song than this. However, if she sang "My Everything" she would have gotten compared to Kimberly Locke.

Rant
I wish they would make the themes more general like "Disco" or 80's music rather than restricting songs to the BG's or Bon Jovi. After all, they didn't make country the Martina McBride song book week.
So in conclusion the best performer of the night- Jordin in "To Love Somebody" with Melinda as runner up in "Mend a Broken Heart"
Predictions for Bottom 2: Jordin and LaKisha
Going home: La Kisha
Should be going home: Blake