Taylor Swift celebrated Pride Month and restated her support for the Equality Act, which would expand legal protections for the LGBT community in the US.
The Grammy-winning pop superstar shared a post on social media backing advocacy group GLAAD's #summerofequality movement.
GLAAD posted a petition calling for senators to pass the bill, which is a priority of president Joe Biden.
Swift, a vocal supporter of LGBT rights, said: "I want to take a moment to thank the courageous activists, advocates and allies for their dedication to fighting against discrimination and hatred.
She added: "I proudly join GLAAD in their #summerofequality and add my voice to those who support the Equality Act. Happy Pride Month!"
The Equality Act would make it illegal to discriminate against someone on the basis of sexual orientation or gender identity.
Opponents say it could force people to act against their religious beliefs.
The Democratic Party-controlled House of Representatives, the lower house of the US Congress, voted to pass the Equality Act in February. However, it faces an uphill battle in the Senate, where the Democrats hold a razor-thin majority.
Swift, who began her career as a country music star before dominating pop, ended her long-held silence on political matters in 2018 and has since become outspoken in her support of LGBT rights.