Lizzo, who has spent the last several months encouraging fans to vote, gave her speech just one day after Donald Trump and Joe Biden faced off in the final presidential debate ahead of the November 3 election.
Mr Trump voted at a library in West Palm Beach, near his Mar-a-Lago estate, after switching his permanent residence and voter registration past year from NY to Florida, a must-win battleground for his re-election bid.
When asked who he voted for, the President said he voted for "a guy named Trump".
Barack Obama hit the campaign trail on Saturday for his former vice president Joe Biden.
Many states have expanded in-person early voting and mail-in ballots as a safer way to vote during the pandemic. "Much more secure than when you send in a ballot, I can tell you that", said Trump, who insists without giving evidence that mail-in voting leads to fraud. "When you send in your ballot, it could never be secure like that", he said.
Early voting is now open in many states, so make sure to figure out your voting plan and make sure your voice is heard in the upcoming presidential election.
"The idea that somehow this White House has done anything but completely screw this thing up is nonsense", Obama told Democratic supporters at a drive-in rally in Miami, Florida, of the pandemic as cases rise across the United States ten days before the November 3 election.
Voting experts have disagreed with Trump's ongoing assault against mail-in voting and his questioning of its security and reliability. Trump will head to three of those after voting, holding rallies in North Carolina, Ohio and Wisconsin.
On the campaign trail on Friday, Biden and Trump renewed their battle over Trump's handling of the COVID-19 pandemic.
President Donald Trump and Democratic presidential candidate, former Vice President Joe Biden, faced off in the final presidential debate on Thursday [File: Jim Bourg/AP] Polls show Biden narrowly leading Trump in the state, which is considered crucial to both candidates. In 2016, he and his wife, Melania, had voted at Public School 59 just a few blocks from Trump Tower in Manhattan.