Harris in Instagram post with Olivia Rodrigo: Vaccines are 'Good 4 U'
© Singer Olivia Rodrigo and VP Kamala Harris. (Instagram)

Vice President Harris took to Instagram Thursday to share scenes of Olivia Rodrigo's White House visit to push COVID-19 vaccination among younger Americans.

"@oliviarodrigo and I agree, vaccines—they’re 'good 4 u.,'" the VP captioned the photo, which showed both women in pink suits, alluding to the pop singer's hit song.

The 18-year-old singer responded to the photo, writing, "ur the best!!!! it was such an honor meeting you!!!!! ❤️❤️❤️"

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Rodrigo, a Disney star-turned-music sensation, joined the Biden administration's efforts to promote COVID-19 vaccination among the young. She stopped by the White House to meet with President BidenJoe BidenThe Supreme Court and blind partisanship ended the illusion of independent agencies Missed debt ceiling deadline kicks off high-stakes fight Senate infrastructure talks spill over into rare Sunday session MORE, Harris and Anthony FauciAnthony FauciSunday shows preview: Delta concerns prompt CDC mask update; bipartisan infrastructure bill to face challenges in Senate Israeli president receives COVID-19 booster shot AstraZeneca CEO: 'Not clear yet' if boosters are needed MORE, the nation's top infectious disease expert, on Wednesday.

The chart-topper also made a surprise visit in the White House briefing room, saying she was "beyond honored and humbled" to be there.

She added, "I am in awe of the work President Biden and Dr. FauciAnthony FauciSunday shows preview: Delta concerns prompt CDC mask update; bipartisan infrastructure bill to face challenges in Senate Israeli president receives COVID-19 booster shot AstraZeneca CEO: 'Not clear yet' if boosters are needed MORE have done and was happy to lend my support to this important initiative."

Rodrigo's vaccine push comes after the Centers for Disease Control and Prevention found that COVID-19 vaccination rates are lower for younger Americans than for older adults.