A Straight Shuter source exclusively told RadarOnline.com, "friends expect Justin to pop the question over the holidays!"
The two have been getting very serious ever since they rekindled their romance earlier this October.
"Justin has been looking at rings and plans to ask her to marry him over Christmas," added the source.
Adding to the marriage rumors, Gomez's mom reportedly suffered a tragic breakdown after discovering just how serious her daughter is about being with Bieber.
Could it be she already spilled the news of their engagement? Let us know your thoughts in the comments below.
Straight Shuter's Rob Shuter has all the latest gossip.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.