50 Cent helps Floyd Mayweather, Jr. celebrate fiancee's birthday

50 Cent helped his jailed friend Floyd Mayweather, Jr. celebrate his fiancee's birthday by documenting her celebrations in Las Vegas.

The boxer is currently behind bars serving a three-month prison sentence for domestic battery and was unable to be with his partner, Shantel Jackson, on her special day.

He made sure she had a good time by paying for her to go out to dinner at the N9ne Steakhouse in Sin City, and also bought a cake shaped like a Balenciaga handbag, a diamond watch, bracelet and ring.

50 Cent was there to help Jackson celebrate and he posted pictures of her opening her presents on his Twitter.com page.

In a series of posts, he writes, "Happy birthday Ms Jackson... Got (sic) damn this must be love, Floyd going hard from jail... Balenciaga alligator bag $30,000, birthday cake priceless. Want a slice."

Jackson stars alongside the rapper in upcoming movie Crossfire. Mayweather, Jr. is expected to be released from prison next month (Aug12).