But it appears some of Trump's supporters aren't amused, and they've been speaking out in her defense.
Here are some of their most interesting arguments:
Even Twilight Sparkle From 'My Little Pony' Has Said Things Similar to Melania Trump and Michelle Obama
"Melania Trump said, 'The strength of your dreams and willingness to work for them,' [and] Twilight Sparkle from 'My Little Pony' said, 'This is your dream. Anything you can do in your dreams you can do now,’" Spicer said. "I mean, if we want to take a bunch of phrases and run them through Google and say, 'Hey, who else has said them?' I could come up with a list in five minutes. And that’s what this is."
When Blitzer commented that there were "pretty stark" similarities between Trump's and Obama's speech, Spicer responded, "I just quoted Twilight Sparkle from 'My Little Pony.' She said something similar too, so did Mrs. Obama plagiarize her too?"
It's Hillary Clinton's Fault
Donald Trump’s campaign chairman, Paul Manafort, dismissed criticism of Melania Trump's speech today and claimed that Hillary Clinton's campaign was to blame.
When "Hillary Clinton is threatened by a female, the first thing she does is try to destroy that person," Manafort said at a news conference Tuesday.
The attack on Clinton prompted a swift response from from her campaign.
"Nice try, not true. @PaulManafort, blaming Hillary Clinton isn't the answer for ever Trump campaign problem," tweeted Jennifer Palmieri, Clinton’s communications director.
Michelle Obama Didn't Invent the English Language
Donald Trump's national campaign spokeswoman, Katrina Pierson, told The Hill today that the similarities between Melania Trump's speech and Obama's speech were "absolutely not" intentional.
"This concept that Michelle Obama invented the English language is absurd," Pierson said. "Look at the remarks from Laura Bush in 2004. I think you'll find something similar."
She added that the values Trump discussed in her speech were "Republican values, by the way."
This Is Just Proof Democrats and Republicans Share the Same Values
"If Melania’s speech is similar to Michelle Obama’s speech, that should make us all very happy," he said. "If we happen to share values, we should celebrate that, not try to make it into a controversy."
Melania Trump's Speech Was Still 93 Percent Different From Michelle Obama's
He added that Trump "worked very hard on that speech" and that a lot of what he heard "sounded very much like her."
'Fragments of Words' Similar to Obama's Speech Still Reflect Melania Trump's 'Own Thinking'
Manafort told CBS today that Melania Trump only used "fragments of words" similar to those used in Obama's speech.
Donald Trump's campaign later said in a statement, "In writing her beautiful speech, Melania’s team of writers took notes on her life’s inspirations and in some instances included fragments that reflected her own thinking."