Twitter is a busy world, and Bollywood contributes a great deal to it. Here's looking at the best star tweets of the day.

Japan's earthquake-tsunami tragedy hasn't gone unnoticed in tinsel town; the tweets have started pouring in.

Riya Sen tweeted: 'Watch BBC 8.2 earthquake/ tsunami destroyin north japan. My heart goes out to those affected in japan'

Ashish Chowdhry prayed for Japan. He wrote: 'Can't believe what's happenin in Japan.Feel so weak n helpless.Can't say 'God help them',cause dunno who does this in d 1st place..'

Mandira Bedi expressed her concern. 'A tsuanami devastates Japan as an earthquake measuring 8.4 hits the country & its coastline.. Prayers and hope for all those affected.. '

As did Ranvir Shorey: 'Prayers for Japan earthquake tsunami'

Lata Mangeshkar tweeted: 'Shocked and deeply distressed! Massive earth quake and Tsunami hits Japan..my heart is going out to the people of Japan..very disturbed!'

Aftab Shivdasani requested respect for nature. 'Its nature's way of saying do not spoil the planet.. Must respect nature..before it gets too late..' he wrote.

Vivek Oberoi's passion for social causes has taken him to Madhya Pradesh. 'On my way to Beharda, a small village in the beautiful state of Madhya Pradesh! In 2009, I decided to give my parents a special gift for their anniversary, I sponsored Beharda village as part of the 'Lighting a Billion Lives' (LaBL) project. We gifted solar lanterns to hundreds of families who had no electricity and lived in darkness. Priyanka and I are really looking forward to meeting the villagers and seeing how the Yashodhara Oberoi Foundation has changed the lives of the people of Beharda.'

Shabana Azmi's single-woman play, Broken Images, has completed a 50-show run and will be featured at the Kennedy Centre in Washington DC. 'Am off to Washington. Broken Images at the prestigious Kennedy Centre and 3 films of mine being screened. Maximum India Festival. Shud b fun,' she tweeted.

R Madhavan, on the other hand, is in Austria. 'Soo much fun on the slopes of Kitzbuhel, Austria.. I am very Proud of my Skiing.. Black slopes today.. Yahooo.'

Celina Jaitley bid goodbye to Thank You. 'Last day of shooting for "THANK YOU" had an awesome time filming this film ..with akshay,sonam,rimmi,bobby,sunil irfan and aneesji,' she tweeted.

Shirish Kunder, who is filming for Joker in Chandigarh, is shooting the final parts of the film. 'Just packed up. Its a schedule wrap for Akshay, Sonakshi and Minissha. We continue shooting with Shreyas for 2 more days,' he said.

Whereas Shruti Hassan finished recording her song. 'Just got done recording my second song with manikanth kadri,always a fun experience and such a cool song!!:)off to shoot for 7am arivu' she said.