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Oprah Winfrey (@Oprah) - Oprah, Cory Booker and others expressed grief in the wake of the mass shooting at a Connecticut elementary school on Friday where at 27 people, including 20 children, were killed. – Britt Middleton (Photo: Twitter)

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Terrence J (@TerrenceJ) - (Photo: Twitter)

Photo By Photo: Twitter

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Justin Bieber (@justinbieber) - (Photo: Twitter)

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Donna Brazile (@donnabrazile) - (Photo: Twitter)

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Rick Santorum (@RickSantorum) - (Photo: Twitter)

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Jennifer Hudson (@IAMJHUD) - (Photo: Twitter)

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Rahm Emanuel (@RahmEmanuel) - (Photo: Twitter)

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John Stamos (@JohnStamos) - (Photo: Twitter)

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Gov. Andrew Cuomo (@NYGovCuomo) - (Photo: Twitter)

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Stacey Dash (@REALStaceyDash) - (Photo: Twitter)

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Keke Palmer (@KekePalmer) - (Photo: Twitter)

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Sherri Shepherd (@SherriEShepherd) - (Photo: Twitter)

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T.J. Holmes (@tjholmes) - (Photo: Twitter)

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Rep. Tim Scott (@RepTimScott) - (Photo: Twitter)

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Cory Booker (@CoryBooker) - (Photo: Twitter)

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Robert Griffin III (@RGIII) - (Photo: Twitter)

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Touré (@Toure) - (Photo: Twitter)