JUSTIN BIEBER and SELENA GOMEZ have broken up. A source says, quote, "Because of their crazy schedules, it was getting harder and harder to maintain a relationship."
--But it might not be that simple. Other sources say it was Selena who did the dumping around Halloween . . . and it was because of Justin's new "friendship" with a Victoria's Secret model named Barbara Palvin.
--On Thursday night, they went to see "The Lion King" on Broadway with a group of people. But afterward, Barbara Tweeted, quote, "hey everyone. please calm down. he is all yours!! :) please :)."
--And she later followed up with this Tweet, quote, "There is nothing going on with him. I met him and did a pic with him. Wouldn't you do the same? #friendship"
--The night before, Justin performed at the Victoria's Secret Fashion Show.
--And after the show, Barbara Tweeted, quote, "okay sooo because u guys were askin for it! with @justinbieber ! you were great tonight!" She added this photo of herself with Justin.
--A source says Justin was playing the field throughout the fashion show . . . quote, "He was asking for phone numbers from the girls . . . He was hitting on [them] all day.”
--In an interview on Saturday, Justin seemed a little confused about how things are going to work out.
--When asked about the breakup, he said, quote, "I don't know what to say. I don't know what's going on in my life. To even assess that, it doesn't make sense 'cause I have not made any comment."
--A source has told TMZ that Justin doesn't want the breakup . . . and he's confident he and Selena will get back together.
(--Meanwhile, Justin performed an acoustic version of JUSTIN TIMBERLAKE'S "Cry Me a River" yesterday in Boston. Here's video.)
(--Afterward, he Tweeted, quote, "Thank you Boston. Focused on the positive. #30MillionBeliebers with me. I'm never leaving you because you are always there for me.")