There are a lot of famous paternity tests that have been the topic of many debates and discussions around the world. Here are some celebrities who have attempted to solve their issues on paternity through DNA testing:

Charlie Chaplin
The famous Charlie Chaplin had a daughter with an American actress, Joan Barry. The daughter is named Carol Ann and was given full rights as a daughter who received allowance until she reached the age of 12. While Charlie and Joan had a very brief affair, an effort to prove paternity was made by comparing blood groups. However, the procedure proved Charlie’s paternity as inconclusive, so he was then excluded as the father. Later, Joan’s attorney convinced the court otherwise.

Eddie Murphy
Eddie Murphy had a short affair with a former Spice Girl member, Melanie Brown. A paternity test was carried out which conclusively showed that Murphy is the father of the child Brown gave birth to. It got sensationalized and became the gossip in many newspapers and articles as Murphy had to dish out child support in huge amounts. Murphy also refused to take the DNA test right from the start.
 
Keanu Reeves
A Canadian woman named Karen Sala claimed that Keanu Reeves fathered 4 of her children. She asked for millions in child support including retroactive child support payments and spousal support. A paternity DNA test later revealed that none of her children was fathered by Reeves. Sala was then forced to pay $15,000 as damages to the Hollywood actor.