‘Mean Girls’ Broadway cast throws the ‘fetchest party of the year’ in Cancun — on Oct. 3

Get in, loser — we’re going to Mexico!

The Broadway cast of “Mean Girls” threw what has been dubbed “the fetchest party of the year” at Grand Oasis Cancun this week.

Ashley De La Rosa (Regina George), Eric Huffman (Damian), Olivia Kaufmann (who pulled double duty as Gretchen Wieners and Janis), English Bernhardt (Cady Heron) and Zurin Villanueva (who starred as Karen Smith but also helped play Gretchen Wieners) kicked off the festivities Wednesday afternoon with a “pink out” pool party at the all-inclusive hotel’s beach club.

The Broadway cast of “Mean Girls” performed in Cancun on Oct. 3. Nicholas Hautman/Page Six The stars sang a selection of songs from the Tony-nominated musical. Nicholas Hautman/Page Six The “Mean Girls” movie starring Lindsay Lohan, Amanda Seyfried, Lacey Chabert and Rachel McAdams (left to right) premiered in 2004. Paramount/Courtesy Everett Collection

After a five-minute performance, which a passing rain shower nearly thwarted, the stars taught swimsuit-clad guests (including Page Six) the iconic “Jingle Bell Rock” choreography made famous in the 2004 movie starring Lindsay Lohan, Rachel McAdams, Amanda Seyfried and Lacey Chabert.

De La Rosa, Huffman, Kaufmann, Bernhardt and Villanueva then kicked back in the pool and enjoyed pink drinks with fellow tourists before heading to rehearsals for their hour-long show, which was aptly scheduled for Oct. 3.

Produced by CheapCaribbean Vacations and Broadway Plus and directed by Christopher Metzger-Timson, Thursday night’s cabaret-style concert at the Oasis Arena saw the cast perform a selection of songs from the Tony-nominated musical adaptation of “Mean Girls,” including “A Cautionary Tale,” “Meet the Plastics” and “Apex Predator.”

The musical cast taught attendees the iconic “Jingle Bell Rock” choreography from the original film (seen here). Paramount/Courtesy Everett Collection Grand Oasis Cancun hosted two days of events in honor of “Mean Girls” Day. Nicholas Hautman/Page Six Some Broadway stars headed to the hotel’s nightclub, Kinky, after their concert. Nicholas Hautman/Page Six

Huffman then called on audience members who learned the “Jingle Bell Rock” dance at the pool the day before to come onstage and join the cast in channeling their inner Regina, Cady, Karen and Gretchen — pink Santa hats and all.

The event wrapped up with a VIP cocktail hour and meet-and-greet at Grand Oasis’ Miramar restaurant, where De La Rosa, Huffman, Kaufmann, Bernhardt, Villanueva and their crew, including musical director Jacob Yates, drummer Elena Bonomo and guitarist David Kawamura, worked the room overlooking the white-sand beach and sparkling Caribbean Sea.

Despite having flights home the next morning, we hear some cast members deservedly kept the party going by hitting up the hotel’s nightclub, Kinky, late into the evening.