Some intentional, some not!
ET's rounded up the 10 best moments that had fans in frenzy this year!
The stars belt out "Joy to the World" with 'The Late Late Show' host.
Hillsong Pastor Carl Lentz gets candid about Bieber's journey and faith.
...What?
Selena is taking a page straight out of her ex's Instagram playbook -- and we love it!
The 21-year-old singer performed a flawless rendition of his hit 'Sorry' on the season 9 finale of 'The Voice.'
In a finale filled with huge stars and massive hit songs, it was the 21-year-old singer who stole the spotlight.
Justin is living his life with 'Purpose.'
Bieber has been keeping himself busy, hanging out with a LOT of models!
Kourtney Kardashian and Justin Bieber are just "good friends," a source tells ET.
The 36-year-old reality star threw a party that was out of this world -- literally!
The reality TV star's family threw an out-of-this-world bash for her two sons, Mason and Reign Disick.
The 'Sorry' singer performs two of his new songs during dinner at The Nice Guy.