LISA MARIE PRESLEY and mom PRISCILLA PRESLEY were in Los Angeles Friday night for a 40th anniversary salute to ELVIS' 1968 Comeback Special -- and ET was with them for the scoop on all things Presley, including their latest thoughts on Lisa Marie's pregnancy, tabloid coverage on it, and Priscilla's upcoming stint on "Dancing with the Stars"!

Arriving at the event in a plunging black jacket and leopard patterned scarf, Lisa Marie looked buoyant, but she confessed that even she is not impervious to the tougher parts of pregnancy, namely being "tired, exhausted, moody... other than that I'm great! I'm actually doing quite well. It's not as bad as I'm teasing!"

Last week, however, the 40-year-old singer and mother of two expressed considerable frustration over tabloid speculation about her weight -- scrutiny which prompted her to announce her first pregnancy with music producer MICHAEL LOCKWOOD.

"Yeah, it was pretty gnarly," Lisa Marie told ET. "That was an unexpected attack -- assault … To have somebody sitting here, taking photographs of you that are really unflattering, you don't really know anything about it, and … [tabloids putting] it in some weird, unnecessary, unhealthy, bad light was what sort of crossed the line."

Will this stressful experience set the tone for the new album she's now writing and recording? "I don't want to make it all about that," the singer smiled. "It'll be whatever's on my mind, everyday. That's usually what I write anyway."

On a more light-hearted note, she expressed a daughter's concern over how mom Priscilla might fare on "Dancing with the Stars," the new season of which premieres live on Monday night at 8 p.m on ABC.

"She can dance. She can dance well," Lisa Marie said of her mother. "I'm just going to be so nervous. I don't want to be in the audience. I'll be in the back … biting whatever's left of my nails off!"

As for Mom herself, Priscilla told ET she's just thrilled at the prospect of becoming a grandma again. "I'm ecstatic," she said. "It's going to be nice to have a little one running around again. Just being around, just the energy."