It's Tuesday! Time for another round of "5 Must-Hear Pop Songs of the Week"!

So much has happened! And by that, I mean the Spice Girls reunion happened and literally nothing else matters. But also, so much new music is happening! This week's roundup features some arena-size dance floor smashes, a pop tune as catchy as Carly Rae Jepsen's summer smash, and an ode to the fabulous five.

Hi, see ya, hold tight!

1.) Neon Hitch featuring Tyga, "Gold"

At long last, fiery-haired gypsy-pop princess Neon Hitch has returned with yet another gem -- or rather, a precious metal. "Gold" is Neon's latest track, which was co-penned with Bruno Mars. Fluttering atop a driving beat and dreamy synthesizers, the gorgeous track sees Neon getting all cutesy with her crush: "There's no light in this room/ It's alright, we got you/ You shine like go-o-o-old," Hitch sweetly croons, recalling the killer hook on her Gym Class Heroes collaboration, "Ass Back Home." Along with a killer verse by Tyga, "Gold" brings enough power-pop melodies and hip-hop flair to ensure that Neon sparkles on top of the charts.

+ LISTEN TO NEON HITCH FEATURING TYGA, "GOLD"

Listen to more Must-Hear Pop Songs after the jump.

2.) David Guetta featuring Sia, "She-Wolf (Falling To Pieces)"

After eating up the entire world with their last mighty collaboration, "Titanium," the adorably quirky and talented Miss Sia Furler is back for another round of total EDM domination with French DJ, David Guetta. "She Wolf (Falling To Pieces)" has Sia working her songwriting magic like no other for one unbelievably gorgeous, whimsical track. "I can't compete with the she wolf who has brought me to my knees/ What do you see in those yellow eyes?/ 'Cause I'm falling to pieces," she cries at the top of her lungs as the track builds, finally exploding into an enormous arena-size breakdown. Think these two have another club smash in their hands? Um, duh.

+ LISTEN TO DAVID GUETTA FEATURING SIA, "SHE WOLF (FALLING TO PIECES)"

3.) Alesso featuring Matthew Koma, "Years"

Swedish House DJ Alesso's had his fair share of dance-floor smashes as of late, including his massive 2011 collaboration with Sebastian Ingrosso and Ryan Tedder, "Calling (Lose My Mind)." Now, he's about to unleash his own big tune for the floor in 2012: "Years." Kicking off with a solitary piano-led introduction, the pulsing beats quickly come pouring in from all angles. To top it all off, there's the vocal assist by up-and-coming singer Matthew Koma: "These will be the years/ The lights will all appear," he croons before crashing into an overwhelming beat breakdown of epic proportions.

+ LISTEN TO ALESSO FEATURING MATTHEW KOMA, "YEARS"

4.) Megan & Liz, "Bad For Me"

Still stuck on Carly Rae Jepsen's "Call Me Maybe"? Time for another serious earworm, this time courtesy of Michigan-born sister duo, Megan & Liz. Much like Miss Jepsen's unstoppable summer smash, the endlessly catchy power-pop anthem -- which you might catch in a Macy's commercial right now -- is an explosion of sugary hooks and string-laden melodies. "He's the melody and she's background noise/ Baby, why can't you see?/ It feels so good, but you're so bad for me," the ladies cry out on the unstoppably repeat-friendly anthem. It's simply too addictive. All day, all night, all the time. All hail the reign of Slaygan & Legendiz!

+ LISTEN TO MEGAN & LIZ, "BAD FOR ME"

5.) Spice Girls, "Viva Forever"

The only thing that mattered in life on Sunday night -- aside from Miley debuting her new hair, y'all! -- was the Olympic Closing Ceremony: Specifically, the (re-)return of the greatest girl group of the century: Spice Girls. Nearly 16 years after their debut, the girls-turned-women made a glorious comeback atop LED-laden black London taxis, crooning their two biggest hits: "Wannabe" and "Spice Up Your Life." It was way, way too much to handle: Scary's sparkly bodysuit! Ginger jumping around like a 5-year-old! Posh refusing to dance like a commoner while delivering high fashion pouts and poses! It was an incredible, all-too-brief moment of nostalgia overload, proving that no matter how many years have gone by, Girl Power is still alive and well. Viva Forever, my Queens.

+ LISTEN TO SPICE GIRLS, "VIVA FOREVER"

Bradley Stern is a writer from Connecticut. In his spare time, he enjoys organizing his Britney Spears CD collection in reverse chronological order and writing impassioned letters to Congress urging that Madonnalogy be taught in all public schools. But most of all, he spends his time tweeting musing daily about pop music on his blog, MuuMuse.

Photo credit: Getty Images, PictureGroup