You can't judge a book by its cover, but for Selena Gomez, it's a book cover that's stirring up more marriage rumors about her and boyfriend Justin Bieber.

Celebuzz reports that Gomez was seen toting the book "The 5 Languages of Love: The Secret to Love That Lasts" with her as she exited a salon on Tuesday.

The Amazon description of the book, by best-selling author Gary Chapman, says it's aimed at married couples and claims couples who read it can "build a lasting, loving marriage together."

Bieber and Gomez have been together for almost two years, but despite persistent rumors, the young couple has always been quick to deny an engagement.

Given that, we're guessing this marriage rumor is false. But let us know in the comments, do you think Justin and Selena will tie the knot?

Click through the slideshow to see photos from Justin and Selena's most adorable dates.

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  • I'll Let Never Let Go, Justin!

    In September of 2011, Justin Bieber tweeted, "romance isn't dead, treat your lady right fellas." And it wasn't just talk. Days later, Justin led his girlfriend Selena through an underground passage to the Staples Center, LA's largest sports arena. And while the Staples Center normally seats up to 20,000 fans for concerts, that night the stadium just had room for two: Justin and Selena, because the Biebs rented the place out for his best girl! Once there, the young couple watched a screening of "Titanic!" Talk about being a romantic!

  • The Day They Came Out

    After months of rumors that they were dating, Selena and Justin finally <a href="http://www.latina.com/entertainment/buzz/selena-gomez-justin-bieber-go-public-vanity-fair-oscar-party" target="_hplink">decided to go public with their romance at the Vanity Fair Oscar party in February of 2011</a>. The teen stars were photographed holding hands, laughing and getting handsy with each other. Awww!

  • Sweets With Her Sweetheart

    Last month, Selena and Justin were spotted <a href="http://idolator.com/6683591/justin-bieber-selena-gomez-ice-cream-date" target="_hplink">walking along Lake Balboa in L.A.'s Van Nuys area</a> licking ice cream by a lake! The cute couple also wore matching vests on their date!

  • In Love On The Red Carpet

    At the MTV Video Music Awards in 2011, Justin planted a big, wet kiss on Gomez's cheek. How cute is that?

  • In Love On Stage

    The couple that presents together, stays together. Here are Justin Bieber and Selena Gomez standing together on stage during the 2011 MuchMusic Video Awards in Toronto. And no -- while that would be incredibly cute -- Bieber is not wearing a t-shirt with Selena's image on it.

  • Slam Dunk Romance!

    The Biebs has been known to take Selena to Los Angeles Laker games (he's a big fan!). Here, they're watching the San Antonio Spurs take on the Lakers.

  • Makeout Hall of Fame

    Did we mention that they also make out during the games?

  • Old Hollywood Glam

    The young lovebirds looked like an old Hollywood couple (so glamorous!) at the American Music Awards last year!

  • All That Jazz

    The young superstar couple went to the Living Room Lounge at the W Hollywood for the hotel's Sunday Jazz Series and enjoyed a performance by resident Brenna Whitaker and her Little Big Band, as well as child trumpet and tap dancing phenomenon, Gabriel Angelo. According to <a href="http://www.people.com/people/article/0,,20618966,00.html" target="_hplink">People.com</a>, Gabriel received a standing ovation from Justin and Selena and the website also reports--via an onlooker--that the young lovebirds "looked very much in love as they held hands at a front-row table," before leaving discreetly around midnight through a back exit.

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