Credit: Adam Rose ©2010 Fox Broadcasting Co. Photo: New Directions Performs in Episode 2.3, "Grilled Cheesus"

Glee manages to pack an insane number of songs into each episode, which means that there will always be a few standouts along with the inevitable dud or two. We've narrowed Tuesday night's performances down to the very best and very worst of Episode 2.3. After all, not every Glee cover can wind up as a bestseller on iTunes!

Best Performance of the Night: “I Want to Hold Your Hand” by Kurt

Looks like there’s an early front-runner for best Glee song of the season! Last week’s performance of “Toxic” was amazing in its own right, but “I Want to Hold Your Hand” hit the sweet spot. First of all, Kurt’s singing and emoting was amazing. Additionally, it’s not easy for a Beatles cover to forever change the way you hear the song, but this one does just that. (Okay, so maybe William’s Shatner’s version of “Lucy in the Sky with Diamonds” forever changed the way we heard that song, but not in a good way.)

Worst Performance of the Night: “I Look to You” by Mercedes

It’s always great to see Mercedes in the mix. But with two Mercedes songs this week, it was hard for this song to compete with the fun and power of her gospel version of “Bridge over Troubled Water.” To be fair, Mercedes’ rendition of “I Look to You” suffered a little from the song itself being a bit forgettable, but at least Whitney Houston’s original had a level of vocal strength throughout that Mercedes’ lacked. If Mercedes’ songs in general have any flaw — and one that was underscored by this song — it’s that she exudes a sort of “get ‘em to the chorus so I can do my runs”-type of thinking that leaves her verses feeling a little flat. (And again, maybe we should blame the show for sticking her with Newfangled Whitney instead of Classic Whitney.)