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It looks like Jennifer Lopez and Casper Smart's recent break up was as amicable as they come.  On the star's 45th birthday Thursday, her ex took to Twitter with an enthusiastic greeting for her special day. 

He wrote, "Happy birthday to the most Beautiful lil bear in the world! May all your wishes come true!" 

Jennifer and Casper split up last month after over two and a half years together.  News of their break up came right as Lopez was about to release her latest album A.K.A.  

Photo: Getty Images