No tweets by President Trump made Twitter's list of the year's most retweeted posts.

But three tweets by former President Barack Obama made the list.

Obama's tweets on "The 9 Most Retweeted Tweets of 2017" include one with a Nelson Mandela quote that says: "No one is born hating another person because of the color of his skin or his background or his religion."

The tweet received 1.7 million retweets and 4.6 million likes.

The second tweet by the former president that made the list includes one sent out on Jan. 10 in which Obama urges people to "believe-not in my ability to create change, but in yours."

The third is from Jan. 20 - when President Trump was inaugurated. Obama tweeted: "It's been the honor of my life to serve you. You made me a better leader and a better man."

Trump in his frequent tweets often attacks his political opponents or the media, referring to media reports or networks as "fake news."

Other posts that made the 2017 most retweeted list include one from Ariana Grande following the terrorist bombing of her concert in Manchester, England.

"Broken. from the bottom of my heart, i am so so sorry. i don't have words," she tweeted in May.