Justin Bieber recently spent some time in Las Vegas and New York with an ex-girlfriend -- not Selena Gomez.

The 19-year-old singer was spotted in Sin City with Jacque Ray Pyles on a private jet just days after the former couple sat next to each other front row at New York Fashion Week. Not word yet if they are officially dating. The two were together in Las Vegas as Bieber watched Floyd Mayweather Jr. claim victory over Saul "Canelo" Alvarez at the MGM Grand.

Among the thousands in the crowd that night were Owen Wilson, Jack Nicholson, William H. Macy, Bar Rafaeli, Denzel Washington, Pete Berg, Liam Hemsworth, Magic Johnson, LL Cool J, Michael Phelps, Wayne Gretzky and Don Cheadle.

See a photo here of Pyles exiting Bieber's private yet.

Pyles is a dancer and singer, and she starred in the 2009 School Gyrls. Bieber also starred in the motion picture, directed by Nick Cannon.

She was part of a group of friends who accompanied Bieber on a vacation to the Bahamas in August, according to The Inquisitr. They were photographed clubbing together with some other friends at 1 Oak on Sept. 8 and the following day at Griffin nightclub. She was also was seen hugging the superstar outside the Funny or Die studios in Los Angeles on Sept. 13.

Justin Bieber & Chris O'Donnell in 'Funny or Die' Sketch [PHOTOS]

Pyles has not directly addressed the status of her relationship with Bieber but she referenced him in a tweet she wrote Tuesday. She tagged Bieber's Twitter account and wrote "She say she love lolly," which are lyrics to the song Lolly, featuring the singer.

See a photo of here of Pyles and Bieber front row at New York Fashion Week.

Bieber's last serious relationship was with Gomez. The two reportedly broke up in early 2013.

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Justin Bieber, Selena Gomez