Before leaving Hollywood, the contestants are told to create groups, with each group given a song - after performing in Vegas they will learn there and then whether they've made it through. Zero pressure.
With everyone safely in Vegas, the judges arrive at their desk (and J-Lo is wearing the most amazing pair of insanely high pair of pink heels ever).
Colton Dixon, Cari Quoyeser, Chase Likens and Skylar Laine (a late addition to the group who was worried she could mess it up for them all) are up first with 'Dedicated To The One I Love' by Mamas & Papas. There's praise for country & western singer Chase and Skylar for moving out of their comfort zone, but Cari was "shaky and weak". Unfortunately for her, it's the end of the road, but it's good news for the other three.
David Leathers Jr, Jeremy Rosado, Ariel Sprague and Gabi Carrubba are up next with 'Rockin' Robin' and it's an easy decision for the judges to send them all through to the next round.
Great Balls of Fire! A piano-playing Adam Brock, Erika Van Pelt, Angie Zeiderman and Shelby Tweten are third on stage… and all of them make it through, although they really drag out delivering the news to poor Angie.
With brother Colton safely through to the next round, it's time for Schyler Dixon to take the stage. She performs 'Why Do Fools Fall in Love' alongside Brielle Von Hugel and Molly Hunt, which makes Steven reminisce about making out to that song in the past… Sadly for Molly, she's out, but Schyler and Brielle are through.
A short montage tells us we've also said goodbye to Wayne Wilson, Ashley Robles, Stephanie Renae, Aubree Dieckmeyer, Janelle Arthur and Tina Torres.
Will Reed Grimm, Elise Testone, Haley Johnson and Eben Franckewitz be any luckier with 'The Night Has A Thousand Eyes'? If the standing ovation from the judges is any indication then, yes, they will be… And they are.
Jermaine Jones and Richie Lawson are a group of two who've apparently struggled with communication while prepping for their performance of 'Make It Easy On Yourself'. On stage, though, it seems their work has paid off because the judges love it and they're both safely through to the next round.
Also through in a quick montage are Hallie Day, Baylie Brown and Chelsea Sorrell.
Closing Day One are Jessica Sanchez, Deandre Brackensick and Candice Glover with 'It Doesn't Matter Anymore'. They're a bit "iffy" with the song at first because it isn't their style, so they decide to change it up a bit. And it pays off - they're all through.
But - the celebrations are slightly short-lived when the judges call everyone back on stage and say they may not be completely safe yet. They're going to be compared to the Day Two performances and if they fall short then they could be going home.
Day two opens with Clayton Farhat, Scott Dangerfield, Adam Lee Decker and Curtis Grey clad in leather and performing 'Jailhouse Rock'. It's mixed reviewed but they're all through except for Curtis, who was apparently a little sharp.
In a few performances we learn Caleb Johnson, Joshua Sanders and Joshua Ledet are among the other singers to have made it through. Meanwhile, at the hotel, we learn several singers are so relaxed about their performance they are just chilling by the pool.
Back on the Elvis Stage, Courtney Williams, Brittnee Kellogg and Jessica Phillips are up with 'You Just Keep Me Hangin' On'. It's good news for the latter two, but Jessica is going home, and she's not happy: "I'm an actual artist and it doesn't seem that they're looking for real artists."
Lauren Gray, Wendy Taylor and Mathenee Treco visit vocal coach Peggi Blu for help with their performance of 'Will You Still Love Me Tomorrow'. Lauren finds herself on the receiving end of some Peggi tough love: "There is no crying in music! Are you Ritalin? No? Then focus. Wake up and smell the coffee. You are in American Idol. You came here to be one - get a grip!" In the end, both Lauren and Wendy make it through but Mathenee is cut.
Next to face Peggi Blu is Heejun Han - who knows what to expect because he looked her up on YouTube. They're off to a good start though when she gives him a hug! Alongside Phil Phillips, Neco Starr and Jairon Jackson, he'll be singing 'I Only Have Eyes For You' - and they're all safe.
Creighton Fraker, Jen Hirsh, Nick Boddington and Aaron Marcellus - aka Group Sauce - are next up, but because they're missing one member they have changed their name to Lady and the Spectacles. They perform 'Sealed with a Kiss' and they're all through except for Nick, who is told it wasn't his best performance.
So, the performances are all over but there are more cuts that need to be made in order for the judges to reach a "workable number". All contestants from Day One and Day Two are called back on stage to find out whether they'll be staying around or going home.
Gabi Carrubba is first to be cut, and she feels embarrassed because the rest of her group are through. Also going home is Schyler Dixon, although her brother Colton Dixon is safe. Angie Ziedermann, Candice Glover, Johnny Keyser, Jairon Jackson and Britnee Kellogg are also cut.
At the end of the day, we learn 42 contestants have made it.
American Idol airs Wednesdays and Thursdays on Fox