
Back in August 2001, Carson Daly hosted Usher on MTV’s “TRL.” On Wednesday night, they were back together as “The Voice” host Daly welcomed new judge Usher at the season 4 premiere at the TCL Chinese Theatre.

Hey, what are they doing here? Joel Madden, Delta Goodrem and Seal are coaches on the Australian version of “The Voice." Keith Urban (now on “Idol”) was the fourth, but he quit.

No, really... what are you doing here? Christina Aguilera took a vacation from her sabbatical by showing up unexpectedly, but gave credence to her public comments about returning for season 5 in the fall.

Miranda Lambert and Blake Shelton arrive at the TCL. (Photo by Getty Images.)

Meanwhile upstairs in the TCL ballroom, David Burtka hosted the Norma Jean Gala, a fundraiser for the Hollygrove charity. The children and family-focused charity once cared for Marilyn Monroe (thus the night’s name) when it ran an orphanage in the 1930s.

SNL’s Taran Killam (left), Colbie Smulders (second from right) and Constance Zimmer (far right) at the Hollygrove benefit, which also included Debby Ryan, Busy Phillips and Neil Patrick Harris.

Over at the Beverly Hilton on Wednesday, “A Night at Sardi’s” chairman Peter Grad, Willow Bay, Disney Chairman and CEO Bob Iger, event chairwoman Laurie Burrows Grad and honoree Ron Howard headlined the Alzeheimer’s Association benefit that raised $1.1 million. (Photos by Alberto E. Rodriguez)

"A Beautiful Mind" producer Brian Grazer was the honoree, but the night of Broadway standards was CBS heavy: “The Big Bang Theory” cast (top), “2 Broke Girls’” star Beth Behrs, and Shanola Hampton, who is on CBS-owned Showtime’s “Shameless”

After years in the wilderness, Blackberry came back with a pitch: Do everything with one thumb. “We’ve spent two years to innovate and come up with a completely different platform," Frank Boulen, Blackberry’s Chief Marketing Officer tells TheWRAP. “We had to catch up on what is expected of a smartphone,” Boulen demonstrated the keyboard-free Z10 for Josh Duhamel on Wednesday night.

Duhamel’s “Transformers: Dark of the Moon” co-star Rosie Huntington-Whitely and Cristina Ricci at the Blackberry soiree at Cecconi's.

Tim Allen with Blackberry’s Richard Piasentin. “We wanted to reconnect with the Hollywood community,” Boulen says. “Some of them have left us and we hope they come back. Customers have changed in the last years from one brand to another, so it’s our turn.”

“It’s not like Participant Media is going to do ‘Going Hungry with the Kardashians’, Participant’s Jonathan King (center) quipped at LMU’s Steed Symposium at CAA on Wednesday night. From left, the panel on socially conscious documentaries included Elvis Mitchell, cinematographer Joan Churchill, King, producer Julie Goldman and Kirby Dick.

AMC’s CEO Gerry Lopez; Open Road Films' CEO Tom Ortenberg; stars Jake Abel, Diane Kruger, Max Irons, and Saoirse Ronan; author Stephenie Meyer, and Open Road's marketing president Jason Cassidy -- all at "The Host" premiere. (Photos by Getty Images)

Diane Kruger and Joshua Jackson at "The Host" fete.

Producers Bill Johnson and Jim Seibel (whose Ashton Kutcher-starring “JOBS” biopic was just postponed indefinitely from April 19), with Open Road's Jason Cassidy at the Arclight’s Cinerama Dome.

Saorise Ronan will get used to this. She’s in L.A. after shooting Wes Anderson’s “The Grand Budapest Hotel” in Germany.

Producer Nick Wechsler, coming off “Magic Mike,” is on a streak with breakout actors. “The Host's” top guys -- Max Irons and Jake Abel -- have been touring with Meyer to promote the March 29 opening.

Peter Dinklage arrives at HBO’s “Game of Thrones” season 3 premiere at the Chinese Theatre Monday night. (Photo by Jason Merritt)

"Thrones" star Nikolaj Coster-Waldau with HBO entertainment president Sue Naegle and programming president Mike Lombardo. (All “Game of Thrones” photos by Kevin Winter, except where noted.)

"Thrones" author George R.R. Martin surrounded by series actesses Rose Leslie and Emilia Clarke.

Lombardo with “Thrones’” Sansa Stark, Sophie Turner.

Lombardo, HBO’s Eric Kessler, "Thrones" series creators David Benioff and D.B Weiss and HBO CEO Richard Plepler.

Sarah Silverman and "Thrones" actress Gwendoline Christie at the Roosevelt after-party.

Not Dustin Hoffman’s “Quartet”: The party scene after the screening. (Photo by Getty Images.)

A double dose of Emilia Clarke.

A month before opening night, the Tribeca Film Festival creative team hit the Beverly Hilton. From left, programmers Sharon Badal, Cara Cusumano and Genna Terranova; artistic director Frederic Boyer, and chief creative officer Geoffrey Gilmore.

As SXSW wrapped in Austin this weekend, musicians James Blake and Kendrick Lamar wrapped out at the dFm and Nylon SXSW suites at the W. (Photo