'Nightline' Daily Line, June 26: Rielle Hunter, John Edwards End Controversial Relationship

1: 24 p.m. ET: What can a "Nightline" anchor learn from a teen idol? You'll have to tune in and find out. Bill Weir interviews Justin Bieber tonight on "Nightline," where the megastar talks about his music, dealing with the fame and his beliefs.

Credit: Donna Svennik/ABC

Watch a sneak peek of the interview HERE:

And BONUS: Bill Weir has a short jam session with Bieber:

11:55 a.m. ET: ADDERALL ADDICTION: Betsy Degree from suburban Minneapolis started taking the prescription drug to keep up with the demands of being a mother of four.

"I couldn't stop," she said. "I could not stop taking them. I'd say I'm just going to take them one more time."

Credit: ABC News

Some women start on Adderall to keep up with the demands of career and home, while others start looking for a quick weight loss fix. Addiction doctors say the situation is getting out of control.

Read the full story HERE.

10:03 a.m. ET: In an exclusive interview with "Good Morning America," Rielle Hunter revealed that she and former presidential candidate, John Edwards have split up.

Courtesy of ABC News

The two started an affair during his 2008 presidential campaign. When Hunter became pregnant, they tried to hide the affair and love child by claiming his aide, Andrew Young, had fathered the child. The ensuing scandal ended his presidential run.

Watch the interview and read the full story HERE