Abhishek Bacchhan and Karishma Kapoor 

Abhishek and Karishma both come from big families and resultantly their engagement made headlines. They officially got engaged but the engagement was short-lived than Abhishek's successful career.

Salman Khan and Aishwarya Rai 

Ash and Salman got really close during the filming of HUM DIL DE CHUKE SANAM and a very popular couple. But Salman's anger led to their break-up. Salman was very possessive of Ash which didn't go very well

Kareena Kapoor and Shahid Kapoor 

They were a very popular and a very stable couple. They dated for 3-4 years but fate had other plans. Kareena's closeness with Saif during the shooting of Tashan led to their Break-up. Their break-up came as a shock to everybody.

Ranbir Kapoor and Deepika Padukone 

A very popular relationship and we all are pretty uncertain about the reason of their break-up.

Bipasha Basu and John Abrahim 

We also wonder WHY :O Bipasha indirectly stated that John had been cheating on her which led to their break-up.