STAR SIGHTINGS: Madonna Raises Millions for Charity, Jordan Rodgers Returns to 'Bachelor' Mansion and More!

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ET has details on what some of your favorite celebs were up to recently that might have flown under your radar.

Throughout the evening of Madonna's ultra-VIP charity event at Miami's Art Basel on Dec. 2, guests were urged by the hostess to take advantage of the ever-flowing Perrier-Jouët Belle Epoque at their tables to help them dig deeper into their pockets to contribute to the cause.

READ: Madonna Jokingly Offers to Remarry Sean Penn for Charity: 'I'm Still in Love With You'

Madonna's celeb friends like Ariana Grande, Sean Penn, Chris Rock, Alex Rodriguez, Dave Chappelle, Karolina Kurkova, and David Blaine participated in the auction where over $7.5 million funds were raised. James Corden served as Master of Ceremonies and kicked off the night saying, "let's toast with Perrier-Jouët for Raising Malawi," at Madonna's star-studded charity bash with cuvées provided by the iconic champagne house.

The day before on the opposite coast, Michael Phelps was on hand to present the Best eSports Player of the Yearto Marcelo "Coldzero" David at The Game Awards 2016 in Los Angeles.

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Also on Dec. 1, Kendall Jenner's rumored beau A$AP Rocky took pictures in the photo booth and spent some time with Russell Simmons at the 7th Annual Bombay Sapphire Artisan Series Finale Party -- hosted by Russell and Danny Simmons -- at Art Basel in Miami.

Zach Hilty/BFA

The same day, Bravo stars Lilly Ghalichi of Shahs of Sunset and Gretchen Rossi from Real Housewives of Orange Countyposed for photos together at HAIRtamin "Goes Hollywood" at Warwick in Los Angeles.

Melody Melikian

DuJour Media, Gilt & JetSmarter hosted a party to kick off Art Basel week on Nov. 30 with friends Larsa Pippen, Jonathan Cheban, Audrina Patridge and Karolina Kurková at The Confidante in Miami.

Gustavo Caballero/ Getty Images

On Nov. 17, Dancing With the Starsalum and NFL MVP Von Miller hosted a workout event with Chef's Cut Real Jerky in New York City.

Brooklyn-based contemporary artist Mark Anthony Green partnered with ultra-premium tequila brand, Tequila Avión, for his What Comes After J? exhibit at W South Beach, where he hosted a private 50-person dinner for guests, including Tyson Beckford and Karrueche Tran at Art Basel in Miami.

Gossip Girl alum Penn Badgley made his Miami Art Basel debut with his band MOTHXR at the Life of the Party event held at the Brickell City Centre on Nov. 28. He and the band had throngs of ladies and fans hanging on every lyric as they played songs from their new album, including "Victim, She Can't Tell" and "Touch." The band later dined at hotspot Quinto La Huella at EAST, where Badgley, now rocking blond locks, was overheard telling a fan it was their first time playing in Miami and they couldn't wait to come back.

STK Midtown New York City was lively on Saturday night as the cast of Saturday Night Live and host Emma Stone descended upon the restaurant for an after-party that went well into the early morning. Cast members, including Kate McKinnon, Aidy Bryant, and Leslie Jones, began filing in around 1:30 a.m. and were joined shortly after by Questlove as well as Stone. Colin Jost, Kyle Mooney and Lorne Michaels were also in attendance.

Stone, who looked elegant in a navy blue suede pea coat and stilettos, was spotted enjoying oysters and sipping on margaritas throughout the evening. She and a group of more than 10 friends closed out the night, leaving around 5 a.m.

Beverley Mitchell brought husband Michael Cameron and their children, Kenzie, 3, and Hutton, 1, to the 6th Annual Santa's Secret Workshop, benefiting L.A. Family Housing at Andaz in West Hollywood, California, on Dec. 3.

Matt Winkelmeyer/Getty Images for Santa's Secret Workshop 2016

Meanwhile, This Is Us star Chrissy Metz left a very generous tip and said goodbye to the staff after getting a manicure at Nail Garden in Burbank, California, on Dec. 4.

On Dec. 5, Bachelor and Bachelorette alums Luke Pell, Jordan Rodgers, JoJo Fletcher, Becca Tilley, Robert Graham and Chris Soules attended Becca Tilley's Blog and YouTube launch party at The Bachelor Mansion in Los Angeles, while Victoria's Secret Angel Taylor Hill sat down with Dimpy Sethi of Amazon's live-stream fashion and beauty show Style Code Live to spill on her beauty hacks, affordable hair favorites and life as a an Angel.

Paul Archuleta/FilmMagic

Hallmark Channel held a screening for the upcoming A Nutcracker Christmas on Dec. 6 at The Grove in Los Angeles. In attendance were the stars of the movie, Amy Acker, Sascha Radetsky and Sophia Lucia along with Jojo Siwa, Trevor Donovan, ET's Cameron Mathison, Chelsea Kane and many more. The guests were delighted to be joined by dancers from the Moorpark Civic Ballet and Dance Theatre.

The new movie is part of Hallmark Channel's Countdown to Christmas and premieres Saturday at 8 p.m. ET/PT on Hallmark Channel.