There's clearly something missing in Britney Spears' life — marriage! The "Lucky" singer is in a hurry to tie the knot with her boyfriend of nearly a year, Sam Asghari. But, sources exclusively tell In Touch that he wants the 35-year-old pop star to pump the brakes on the wedding talk.

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The source exclusively explains that the fitness model “isn’t on the same page right now,” which of course upsets Brit. "Sam told her that he feels their relationship has moved way too quickly. He’s only 23 and isn’t ready for that next step yet."

The fact that Sam and Britney aren't on the same page really puts a dent her plans. The singer had hoped to marry her beau in December after her Las Vegas residency ended. At least she can take comfort in the fact that it's not Sam's lack of love for Britney that's holding him back… He's just young and isn't ready to take that big of a step (yet).

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“Sam loves Britney. It’s not that he doesn’t want to be with her,” adds the source, “he just needs some time to grow up.” So there might be hope for the couple after all!

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The star's not just thinking of herself when it comes to marrying Sam. Sources exclusively revealed to In Touch last month that she also thinks he makes a great father figure to her sons: "She thinks Sam would not only be the perfect partner, but he'd be a perfect stepfather to her kids Sean, 11, and Jayden, 10."

We hope Sam comes around and realizes he could marry the princess of pop… Because honestly, who wouldn't want that?