Selena Gomez on The Cover of Teen Vogue's September Issue (Photo : Teen Vogue Official Website)

Is Selena Gomez preparing to tie the knot with Justin Bieber?

The 20-year-old starlet was spotted with a self-help relationship book Tuesday, stirring speculations for her heated relationship with Bieber.

Gomez carried “The 5 Languages of Love: The Secret to Love That Lasts” by relationship counselor Dr. Gary Chapman as she was leaving the Nine Zero One salon in West Hollywood, according to The Daily Mail.

Like Us on Facebook

The book targets married couples, and explains what the author describes as five languages of love - “words of affirmation, quality time, receiving gifts, acts of service and physical touch.”

Is Selena considering to “build a lasting, loving marriage together” with Justin?

The superstar couple, who have been dating for two years, are reportedly about to build a love nest in Tarzana, Calif.

"Justin and Selena are building a massive home together. It’s just a dirt lot right now with some pipes, but it has a gorgeous panoramic view of the San Fernando Valley,” a source told Hollywood Life.

Bieber and Gomez are said to be building their love nest there, so the superstar couple could spend more time together. The duo already spend lots of their free time together in The Valley.

It seems there is no hindrance for the duo to walk down the aisles?

Gomez has even received the seal of approval from Bieber’s mother Pattie Mallette.

“How can you not like her?” Mallette said when she appeared on the Ellen Degeneres Show earlier this week.

“She’s so sweet and she’s good for him, and they’re great together. They’re adorable.”