Justin Timberlake & Ben Affleck react to Boston bombs

Musicians and stars from all over the world are sending prayers and love to all those affected by the explosions during the Boston Marathon yesterday afternoon.

What've should've been a day of joy and celebration for the city of Boston, and its people, soon turned into one of tragedy when simultaneous explosions disrupted the 177th running of the world famous race. According to the latest reports, at least three people are reported dead and 73 more injured.

US President Barack Obama addressed the nation shortly after the bombings, asking fellow Americans to "say a prayer for Boston," and adding that "Michelle and I send our deepest thoughts and prayers to the families of the victims in the wake of this senseless loss."

Musicians and stars from around the globe, including many Bostonians, took to social media with messages for those affected.

Here's some of them:

Dropkick Murphys @DropkickMurphys
"Boston your in our prayers from California...be safe everyone !!!! Unbelievable"

Pixies @Pixies
"BOSTON, we are with you."

Ke$ha @keshasuxx
"My heartfelt love goes out to those affected by today's tragedy in Boston. All of our thoughts are with you. #loveintothelight"

Ben Affleck @BenAffleck
"Such a senseless and tragic day. My family and I send our love to our beloved and resilient Boston."

Grizzly Bear @grizzlybear
"We have family and roots in Boston and are sending as much love as one can from across the country. Stay strong. Much love."

Justin Timberlake ‏@jtimberlake
"My thoughts and prayers are with everyone in the city of Boston and all of those affected by this terrible incident."