What better way to ring in the new year than with a loved one?
Nicole Kidman surprised Keith Urban on stage as the singer headlined Jack Daniel's Music City Midnight: New Year's Eve in Nashville, Tennessee on Saturday. The father of two put on an incredible tribute to artists lost in 2016, including Prince, David Bowie, Merle Haggard, Leonard Cohen and Glenn Frey -- with Kidman joining her husband on stage and dancing in the background.
The same night, Justin Bieber performed poolside at Fontainebleau Miami Beach, taking the stage right before the clock struck 12 to perform his hit songs, "Sorry," "What Do U Mean," and "Boyfriend," before DJs Marshmello and Skrillex joined the singer onstage for "Where Are U Now." As for who was in attendance for Bieber's New Year's performance? That would be Johnny Manziel, Jeremy Piven, Ansel Elgort, Lala Anthony, and Jonathan Cheban.
The next night, Khloe Kardashian was spotted snuggling up to boyfriend Tristan Thompson across from Bieber's table at LIV Miami, where club-goers danced along to performances by Fabolous and Trey Songz. Bieber continued the night with Odell Beckham Jr., Victor Cruz and Jeezy at E11even, where the singer, wearing a grey hoodie, drank Stella Artois beers while the rest of the group ordered multiple bottles of Dom Perignon and Hennessy. The group partied for two hours, eating pizza and chicken sliders before leaving out the back entrance at 7 a.m.
Meanwhile, in Las Vegas, Sting performed to a sold-out crowd on New Year's Eve at the Chelsea at The Cosmopolitan of Las Vegas, perfoming his top hits like, "Roxanne," "Every Breath You Take," "Message in a Bottle," and "Desert Rose."
Also in Las Vegas, Sean "Diddy" Combs and his crew hosted an uber exclusive after hours event inside LAVO Casino Club at The Palazzo. Guests toasted to the new year with CÎROC Vodka and DeLeon Tequila while enjoying the sounds of DJ Cassidy. Notables in attendance included Combs, Cassie, French Montana, DJ Khaled, Diplo, Jermaine Dupri, Terrance J, Kevin Durant, Belly, T Pain, Machine Gun Kelly and Mr. Brainwash to name a few.
Over in New York City, Busy Philipps was spotted celebrating the launch of Campbell's new Well Yes! Soup, and encouraging everyone to embrace a small, positive #WellYesMoment.
Model Keleigh Sperry, meanwhile, stunned on set with Buxom Cosmetics at Milk Studios in the City That Never Sleeps.
There's no rest for Kidman during the holiday season, as the actress rushed over to NYC on Jan. 4, joining Lion co-star Dev Patel at TimesTalks, where they spoke about their critically acclaimed film at the Merkin Concert Hall at Kaufman Center.
The next day, singer songwriter Kehlani gave a special performance of her hit song "Gangsta" from Suicide Squad, along with her SweetSexySavage album single, CRZY, at the Kiehl's Pure Vitality Skin Renewing Cream Summer in January launch party at Bleecker Event Hall in NYC.
In Beverly Hills, Lisa Rinna and Harry Hamlin geared up for the holiday season by spending time with family, bringing their 18-year-old daughter, Delilah, to the 3rd Annual CinéFashion Film Awards, while they posed on the red carpet with executive producer Daphna Edwards Ziman of CINÉMOI TV at the The Saban Theatre on Dec. 15.
Sharon Stone prepped for the New Year with a massage and pedicure in Los Angeles.
UFC Champion Conor McGregor was spotted at The Stronach Group-owned Santa Anita Racetrack in Arcadia, California, training with John Lovitz this week, where the two were shooting a commercial for the upcoming $12 Million Pegasus World Cup Invitational, the world's richest horse race. The race will take place on Jan. 28 at Gulfstream Park in South Florida.
On Jan. 2, Nick Viall got a surprise visit from his two ex-girlfriends, Andi Dorfman and Kaitlyn Bristowe, during his appearance on Jimmy Kimmel Live: Here for the Right Reasons after the premiere of the new season of The Bachelor on ABC.
From the current Bachelor, to former Bachelor stars! Former Bachelorette Amy Rosenbaum and her husband, J.P., posed with Dillon King and Amy King at the premiere party for WE tv's Marriage Bootcamp Reality Stars at Nightingale in Los Angeles on Jan. 5. Fellow castmate, Mob Wives star Rennee Graziano, arrived sans boyfriend, Joey Gambino, but was snapping selfies while dancing to Prince's "1999" with her sister, Jenn Graziano.
Also that day, Nick Jonas celebrated Altec Lansing's first celebrity partnership during CES 2017 with a bash at Marquee Nightclub's Boom Box Room in Las Vegas, Nevada.
Central Intelligence co-stars, Kevin Hart and Aaron Paul, reunited at the PokerStars Championship Bahamas on Jan. 6.
Check out even more star sightings in the gallery below.