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Ariana Grande Sparks

Ariana Grande is making her pop stardom official with her first endorsement deal. Billboard says the "Problem" singer has signed on to be the spokesperson for Wat-Aah!, a new bottled water for kids and teens. 

The 21-year-old has also become an equity partner in the company and will be starring in a huge marketing campaign set for early 2015. 

In a statement, Ariana says she's teaming up with Wat-Aah! because "living a healthy lifestyle is so important to [her]."  She adds that "[her] fans are [her] everything, and because of this, [she] could only endorse something [she] believes in."  

Past endorsements for Wat-Aah! have come from stars like Beyonce, who collaborated with the company as a part of First Lady Michelle Obama's Let's Move campaign.