THE MOST POWERFUL TESTS OF STELLAR STRUCTURE AND EVOLUTION COME FROM THE BRIGHTEST STARS IN THE NIGHT SKY FOR WHICH COMPLEMENTARY OBSERVATIONAL TECHNIQUES (SUCH AS ASTROMETRY ASTEROSEISMOLOGY AND INTERFEROMETRY) CAN BE COMBINED. SO FAR STARS BRIGHTER THAN KP<8 MAG WERE RARELY OBSERVED WITH KEPLER/K2 DUE TO THE LARGE NUMBER OF PIXELS REQUIRED TO CAPTURE THE SATURATED PIXEL COLUMNS. WE PROPOSE TO ANALYZE K2 OBSERVATIONS OF THE BRIGHTEST STARS IN CAMPAIGNS 17-19 INCLUDING A NOVEL TECHNIQUE WHICH USES A SMALL NUMBER OF UNSATURATED PIXELS. ASTEROSEISMIC STUDIES OF THESE TARGETS WILL ALLOW UNPRECEDENTED TESTS OF ASTEROSEISMIC SCALING RELATIONS WHICH WILL PAVE THE WAY FOR THE SUCCESS OF THE K2 GALACTIC ARCHEOLOGY PROGRAM AND INSIGHTS INTO POORLY UNDERSTOOD INTERNAL PROCESSES OF INTERMEDIATE-MASS STARS SUCH AS CONVECTIVE CORE OVERSHOOTING. WE WILL PERFORM PHOTOMETRY ON ALL STARS WITH KP<8 MAG IN C17-19 USING CONVENTIONAL APERTURES AND SMALL (~24 PIXEL DIAMETER) CIRCULAR APERTURES AROUND THE SATURATED CORE FOR VERY BRIGHT (KP<6) TARGETS. FOR THE LATTER WE WILL PERFORM PHOTOMETRY USING WEIGHTED SUMS OF UNSATURATED PIXELS IN THE WINGS OF THE CIRCULAR APERTURE. THE METHOD (SO-CALLED HALO PHOTOMETRY) HAS BEEN DEMONSTRATED TO DETECT PULSATIONS FOR ALL BRIGHT PLEIADES AND HYADES STARS IN EARLIER CAMPAIGNS. WE WILL ALSO ORGANIZE SPECTROSCOPIC AND INTERFEROMETRIC FOLLOW-UP OBSERVATIONS THAT WILL BE COMBINED WITH THE K2 PHOTOMETRY. OUR PROPOSAL ADDRESSES FUNDAMENTAL STELLAR ASTROPHYSICS A KEY SCIENCE GOAL OF THE K2 MISSION. OUR PROJECT FURTHERMORE SUPPORTS GALACTIC ASTROPHYSICS ANOTHER KEY SCIENCE AREA IDENTIFIED IN THE NRA THROUGH THE CALIBRATION OF SCALING RELATIONS FOR GALACTIC ARCHEOLOGY STUDIES. A BETTER UNDERSTANDING OF STELLAR MODELS THROUGH THE STUDY OF BRIGHT STARS IS RELEVANT FOR SCIENCE GOALS PURSUED BY BOTH PRESENT AND FUTURE NASA MISSIONS SUCH AS THE CHARACTERIZATION OF EXOPLANETS (TESS JWST) AS WELL AS STELLAR POPULATIONS AND GALAXY FORMATION/EVOLUTION (HST JWST).