An example of congrats is what a high school student says to a friend after they graduate.
Sent him my congrats.
Serious congrats to you both.
Just wanted to add my hearty congrats to you and Matt for entertaining me so fantastically from the day the show started.
A merry birthday was had, with congrats to Ken!
Big congrats to Tim, who now looks like he will be riding in the expert category next year.
Many congrats on this fine day.