Today on Twitter several celebrities weighed in on yesterday's (April 15) Boston Marathon bombing, while the rest were preoccupied with other important business.

Cher

Ron Perlman

Also offering condolences was Melissa Joan Hart of 'Melissa & Joey,' who echoed the sentiments of many:

Meanwhile, acclaimed author and national treasure Joyce Carol Oates took a more intellectually rigorous response, dissecting the nature of terrorism:

It's unclear whether Paris Hilton was referring to the bombing when she tweeted this platitude, but it was a good effort. Unfortunately, this is the most retweeted item on our list today:

But not everyone was still focused on the horrific. Snooki, for instance, was playing maid:

And lastly, original 'America's Next Top Model' winner Adrianne Curry was dealing with a problem of her own: