Julianne Hough, Nina Dobrev Show Off Sexy Bikini Bodies

Girls just want to have fun -- and from the looks of these pictures, that's exactly what Nina Dobrev and Julianne Hough are doing in Miami. On Sunday, April 28, the Vampire Diaries star and the Safe Haven actress, both 24, enjoyed a relaxing day at the beach in Florida, where they showed off their slim, sexy bikini bodies.

Hough, who split from longtime boyfriend Ryan Seacrest in March, soaked up the sun in a printed halter-style top and neon-pink side-tie bottoms. Her newly cropped blonde bob was pulled back into a braid, courtesy of pal Riawna Capri, owner of the Nine Zero One salon, who joined the Dancing With the Stars alum on the sandy excursion. (At one point during the day, the ladies were spotted braiding each other's hair as they lounged on a towel.)

Dobrev, meanwhile -- who is in a long-term relationship with her Vampire Diaries costar Ian Somerhalder -- flaunted her toned abs and lean legs in a floral bikini. Her long brown locks hung in loose, beachy waves, and she wore a gold watch and sunglasses
.This is not the first time the hot Hollywood pals have hit the beach together in recent weeks. Days after Hough split from American Idol host Seacrest last month, the pair had some fun in the sun in L.A. with Capri, Morgan Johnson, and another friend, Jill. "Beachin' with my bitches," the Rock of Ages actress captioned a sun-filled shot of the group. "#friendsarethebesttherapy."

That outing was followed by a trip to Staples Center, where Hough and Dobrev cheered on the Los Angeles Lakers against the Sacramento Kings. It was Hough's first big public outing since her breakup went public.

The girls-only bonding sessions seem to be in line with what Hough is looking to get out of life right now. Indeed, a source told Us Weekly that Seacrest's breakneck schedule was largely to blame for the end of their two-year relationship.

"Dude works all the time," a friend told Us at the time. "He never sleeps. It's a lifestyle she couldn't handle anymore. Work always, always came first [for him]. She wants a more low-key life."

Jonathan Knight exits New Kids on the Block show mid-concert

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New Kids on the Block singer Jonathan Knight left fans confused and concerned Thursday when he walked off stage in the middle of a concert in New York.

According to reports, the five-member boy band was performing a mix of their old hits from the late '80s and early '90s, along with music from their new album, "10," when onlookers noticed that Knight seemed out of place.

HollywoodLife.com's Emily Longeretta was in the front row, and wrote on the celebrity website that Knight "seemed out of it. While the men started their choreographed dances, Jonathan stood uncomfortably in the background -- actually just standing and texting on his phone during the performance."

Billboard.com also reported that Knight seemed "visibly out of sync." He didn't join in when NKOTB got fans' arms waving with the memorable 1989 single "Hangin' Tough," and kept to the back of the stage as the other members worked to entertain the crowd.

The other members -- Knight's brother, Jordan, plus Danny Wood, Joey McIntyre and Donnie Wahlberg -- put their arms around him for support. Yet when Jordan said his brother was going to sing "Survive You" from "10," Knight made an attempt at the song, and then walked off the stage.The rest of NKOTB went on singing as fans chanted for Knight's return, but he never came back. The singer has been vocal in the past about his struggle with anxiety, prompting speculation that that's what he was facing Thursday night.

On his Twitter account, Knight appeared to give fans a simple apology, tweeting "I'm sorry......" on Thursday evening. Earlier that day, he posted the hashtag "I feel naked," perhaps indicating his state.

NKOTB, one of the heartthrob boy bands of the late '80s and early '90s, came off a lengthy hiatus in 2008, and have issued two albums since then. They're also slated to go on a tour this summer with 98 Degrees and Boyz II Men, and Jonathan's performance Thursday had some questioning how many members of the group would make it.

But Wahlberg, for one, seemed unruffled.

"To recap," he tweeted after the New York event. "Joe was especially dazzling! Jordan was especially amazing! Danny was especially solid & Jon was especially shy! #Allsystemsnormal"