The singer took to Twitter with two posts about the tragedy.
Reports suggest a Coldplay gig at the Belasco Theater in LA on Friday night was almost cancelled after the band got word of the news.
However, the rockers went ahead with the show as planned, opening with a minute's silence and a rendition of John Lennon's peace anthem Imagine.
Coldplay later released a statement announcing a performance which was due to be streamed online on Saturday had been postponed, and they would instead play a stripped back show for ticket-holders.
"Tonight's live stream for Tidal... has been postponed out of respect for the terrible events in Paris," they wrote.
" All tickets will be valid for the rescheduled show, with details to follow soon. For those of you already down at the venue and those on your way, we'll play a short set of old material so that your journey isn't wasted. We send our love and prayers to the people of Paris. Love Coldplay."
Other stars expressed their shock and sadness on social media as the atrocity was unfolding, with many telling their fans to "Pray for Paris".
Taylor Swift tweeted a photo of herself on a bridge in the capital with a heartfelt message.
Actress Ashley Judd , who was about to board a flight to the French capital before planes heading to Paris were grounded also tweeted her prayers.
Other stars to have tweeted their condolences include rapper Lil Wayne, British singer Florence Welch, country star Carrie Underwood, actress Milla Jovovich and pop star Katy Perry and Chris Rock and many more.
All of the weekend's sporting fixtures in Paris were cancelled, Disneyland Paris was closed and Irish rockers U2 axed their Saturday night show in the city.
Foo Fighters separately announced that the band was cutting short its world tour.
"In light of this senseless violence, the closing of borders, and international mourning, we can't continue right now. There is no other way to say it. This is crazy and it sucks," the band said in a statement.
Foo Fighters had been due to play at Bercy, also known as AccorHotels Arena, the day after U2 and also had shows left in Turin, Lyon and Barcelona.
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In contrast, another veteran rock band, Motorhead, will go ahead today (Sunday) with a show.
The high-decibel heavy metal group led by Lemmy will play the Zenith, the second-largest indoor venue in Paris at 6,000 capacity.
- AAP