Alexa Vega recently got engaged to Carlos Pena. Only toofab has the details of their proposal -- and it was Big Time!

Sources close to the situation tell toofab exclusively that Carlos proposed to Alexa on a cruise ship, in front of his Big Time Rush bandmates and her sister.

The singer proposed the day after BTR's Mexico City August 11th concert.

The canary diamond ring was custom-made, Carlos worked with a jeweler on the sparkler, which you can see above.

It's the first marriage for the 24-year-old pop star, and the second for the 25-year-old actress. Alexa was previously married to producer Sean Covel from 2010 to 2012.

Check out more celebrity engagement rings by clicking on the "Launch Gallery" above.

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