What's your favorite 'Glee' number?

Not so easy, right? That's a question that's sure to spark a heated Gleek debate. With close to 300 performances so far in the show's three seasons, there's definitely plenty to choose from.

At a taping of the show's big diva mash-up for the 300th song, the cast and crew shared their own personal favorite numbers, ranging from 'Trouty Mouth' to Lady Gaga and every Broadway homage in between. See which numbers struck a chord with them after the jump.

['Glee' -- 'Pot O' Gold']

After a three week hiatus, I honestly didn't know what to expect from 'Glee' this week. So to say that I was pleasantly surprised is an understatement. It definitely wasn't as good as 'Asian F,' but it was better than a majority of Season 2, so I'll call this one a win.

Actually, call me completely shocked. To be honest, I totally didn't see that super awkward Puck and Shelby kiss coming this episode. Even though I knew it was headed there, that didn't make it any less creepy.

Not only did we get a bit of totally illegal Shelby/Puck action, we also met the much-anticipated new kid.

When we heard that 'Glee' was celebrating its upcoming 300th musical number with a special diva mash-up, we could hardly contain our excitement. We all have our own personal favorite numbers from the show, but seeing what's to come between now and milestone number 300? Well, there are just too many musical possibilities there not to get our minds into full casting mode.

In honor of the show's return (Tues., Nov. 1, 8PM ET on Fox), AOL TV decided to offer some free advice to the showrunners -- we mapped out who should sing the tracks leading up to lucky No. 300, laying out some possible new plot points as well.

We already know some of the answers, but for the rest we used our encyclopedia of 'Glee' knowledge to recommend the optimal vocalists for each upcoming track. Take a look ...

Gleeks, say hello to McKinley High's latest heartthrob: Rory Flanagan, played by 'The Glee Project' winner Damian McGinty.

Fans of the Oxygen reality competition show swooned over the 18-year-old former Celtic Thunder singer, partly because of his dreamy Irish accent, but mostly because of his adorably clumsy footwork and his velvety smooth voice.

Next week's 'Glee' (Tues., Nov. 1, 8PM ET on Fox) marks the much-anticipated arrival of McGinty as McKinley High's new Irish foreign exchange student, but he's not exactly receiving the warmest welcome.

"Rory is very sweet and really innocent, and it's kind of sad because he wants to fit in and he always has a smile of his face, but he's just getting continually bullied," McGinty told us. "He's getting thrown off lockers and pushed into lockers. It's quite sad. He just wants friends and for people to like him." See? Adorable.

Make sure there's room on your iPod because 'Glee' is finally back.

In 'Pot O' Gold' (Tues., Nov. 1, 8PM ET on Fox), a new foreign exchange student -- 'The Glee Project' winner Damian McGinty -- moves in with Brittany, and our favorite funny cheerleader thinks the young Irish lad is a leprechaun. Naturally. Meanwhile, Mercedes attempts to recruit new members to Shelby's rival glee club and Sue's campaign heats up.

What will they sing? Find out after the jump.

'Glee' isn't back until Tues., Nov. 1 and we know it'll be a rough few weeks for Gleeks. However to tide you over, you might want to see these previews from the next all-new episode, 'Pot O' Gold.'

In the episode, 'The Glee Project' winner Damian McGinty makes his first appearance as an exchange student, Blaine (Darren Criss) sings Katy Perry again and Mercedes and Santana cover Christina Aguilera's 'Candyman.' Plus, it looks like Quinn is still scheming to get Beth back.

Check out some episode stills, the songs and a preview video below.

The 'Glee Project' finale had a surprise ending when 'Glee' creator Ryan Murphy revealed not one but two winners -- Samuel Larsen and Damian McGinty. The pair appeared on 'Access Hollywood Live' (weekdays, syndicated on NBC) to talk about their road to the finale, and what the win means to them.

The finale taped in April, which means Larsen and McGinty haven't been able to tell anyone about their win for months. "Oh, I told my mom and dad," said Larsen. "No, I mean, when they slap that kind of a contract in your face and tell you the consequences, you keep your mouth shut."

Larsen also said he had been tempted in the past to lose the dreads to get parts and pass auditions, but he's thankful he never cut them. "And I'm so glad I didn't because, you know, now it's kind of become a trademark thing," he said. McGinty was a bit more philosophical about the win. "To come out on top along with Samuel," he said, "you know, it proves the underdog can, you know -- which is what 'Glee's' about, which is even more incredible -- but it proves the underdog can come out on top."