Hillary Clinton had a very Las Vegas experience Thursday night while campaigning ahead of the Nevada caucuses: she met pop star Britney Spears.

The pop star, who is performing in her own show on the Las Vegas Strip, tweeted out selfies with Clinton.

"Being in Vegas for #PieceOfMe is amazing for so many reasons... Especially today ... because I had the incredible opportunity to meet @HillaryClinton!!" Spears tweeted, calling Clinton "such an inspiration and beautiful voice for women around the world."

"This woman had an intense presence and I felt very honored to meet her!!!" Spears posted on Instagram.

Spears stopped short of a full endorsement, however. She reportedly included the #ImWithHer hashtag in her initial Instagram post -- the official hashtag of the Clinton campaign -- but later deleted it.

Clinton is campaigning across Nevada in the final day before Saturday's Democratic caucuses, where she is locked in a tight race with Vermont Sen. Bernie Sanders.