WASHINGTON--First Lady Michelle Obama is on a publicity swing to mark the third anniversary of her "Let's Move" healthy eating and exercise project, in New York on Friday to guest on "Late Night with Jimmy Fallon"--actress Scarlett Johansson will also appear-- and to tape interviews with ABC's Robin Roberts and the Dr. Oz Show.

Mrs. Obama hits Chicago on Thursday as part of her "Let's Move" publicity blitz.

The ABC segment will air on Good Morning America--Roberts is the co-host-- on Tuesday.

Secretary of Education Arne Duncan joins Mrs. Obama to tape the Dr. Oz episode to "talk about how physical activity affects both children's health and academic achievement. This episode will air on Thursday, the day Mrs. Obama and Secretary Duncan will make a major announcement about bringing physical activity back to schools," the White House said.

Mrs. Obama has a comfort level with Fallon and Roberts, having given them interviews in the past.

THE OBAMA/FALLON FILE: In February of 2012--to mark the "Let's Move" second anniversary, Mrs. Obama played tug of war with NBC's Fallon, with the rope pull in the Diplomatic Reception Room of the White House videotaped on Jan. 25, 2012.

Last April, President Barack Obama slow jammed the news--about student loan rates--with Fallon, taping the show at the University of North Carolina to send a message to a young audience to push Congress to prevent loan rates to rise.