Everyone knows Barney,... that cute purple dinosaur. 
But here's something that you may not know: 

1. Start with the given: 
CUTE PURPLE DINOSAUR 

2. Change all U's to V's (which is proper Latin anyway) 
CVTE PVRPLE DINOSAVR 

3. Extract all Roman Numerals: 
CV V L DI V 

4. Convert these into Arabic values: 
100 5 5 50 500 1 5 

5. Add these numbers up: 
100 
5 
5 
50 
500 
1 
+ 5 
---- 
666 
There you have it..... 
A valid mathematical proof that Barney is the Antichrist!